diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 12f9e2c..f4b9d34 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,6 +3,16 @@ Changelog
 
 Versions follow `Semantic Versioning <https://semver.org/>`_ (``<major>.<minor>.<patch>``).
 
+v1.8.1 (TBC)
+------------
+
+Bug Fixes
+^^^^^^^^^
+
+* `#273 <https://github.com/readthedocs/sphinx-autoapi/issues/273>`:
+  Fixed type annotations being shown for only a single module.
+
+
 v1.8.0 (2021-04-12)
 -------------------
 
diff --git a/autoapi/extension.py b/autoapi/extension.py
index 54bc014..a80dbab 100644
--- a/autoapi/extension.py
+++ b/autoapi/extension.py
@@ -169,10 +169,6 @@ def run_autoapi(app):  # pylint: disable=too-many-branches
         if app.config.autoapi_generate_api_docs:
             sphinx_mapper_obj.output_rst(root=normalized_root, source_suffix=out_suffix)
 
-        if app.config.autoapi_type == "python":
-            app.env.autoapi_objects = sphinx_mapper_obj.objects
-            app.env.autoapi_all_objects = sphinx_mapper_obj.all_objects
-
 
 def build_finished(app, exception):
     if not app.config.autoapi_keep_files and app.config.autoapi_generate_api_docs:
@@ -188,6 +184,12 @@ def build_finished(app, exception):
             sphinx_mapper.build_finished(app, exception)
 
 
+def source_read(app, docname, source):  # pylint: disable=unused-argument
+    # temp_data is cleared after each source file has been processed,
+    # so populate the annotations at the beginning of every file read.
+    app.env.temp_data["annotations"] = getattr(app.env, "autoapi_annotations", {})
+
+
 def doctree_read(app, doctree):
     """
     Inject AutoAPI into the TOC Tree dynamically.
@@ -282,6 +284,7 @@ def viewcode_follow_imported(app, modname, attribute):
 
 def setup(app):
     app.connect("builder-inited", run_autoapi)
+    app.connect("source-read", source_read)
     app.connect("doctree-read", doctree_read)
     app.connect("build-finished", build_finished)
     if "viewcode-find-source" in app.events.events:
diff --git a/autoapi/mappers/python/mapper.py b/autoapi/mappers/python/mapper.py
index 57dd50c..655e5c8 100644
--- a/autoapi/mappers/python/mapper.py
+++ b/autoapi/mappers/python/mapper.py
@@ -340,6 +340,7 @@ class PythonSphinxMapper(SphinxMapperBase):
 
     def map(self, options=None):
         self._resolve_placeholders()
+        self.app.env.autoapi_annotations = {}
 
         super(PythonSphinxMapper, self).map(options)
 
@@ -355,6 +356,9 @@ class PythonSphinxMapper(SphinxMapperBase):
             obj.submodules.sort()
             obj.subpackages.sort()
 
+        self.app.env.autoapi_objects = self.objects
+        self.app.env.autoapi_all_objects = self.all_objects
+
     def create_class(self, data, options=None, **kwargs):
         """Create a class from the passed in data
 
@@ -411,5 +415,4 @@ class PythonSphinxMapper(SphinxMapperBase):
             if return_annotation:
                 obj_annotations["return"] = return_annotation
 
-            annotations = self.app.env.temp_data.setdefault("annotations", {})
-            annotations[obj.id] = obj_annotations
+            self.app.env.autoapi_annotations[obj.id] = obj_annotations
diff --git a/tests/python/pyautodoc_typehints/conf.py b/tests/python/pyautodoc_typehints/conf.py
new file mode 100644
index 0000000..4d34f5a
--- /dev/null
+++ b/tests/python/pyautodoc_typehints/conf.py
@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+
+templates_path = ["_templates"]
+source_suffix = ".rst"
+master_doc = "index"
+project = u"pyexample"
+copyright = u"2015, readthedocs"
+author = u"readthedocs"
+version = "0.1"
+release = "0.1"
+language = None
+exclude_patterns = ["_build"]
+pygments_style = "sphinx"
+todo_include_todos = False
+html_theme = "alabaster"
+html_static_path = ["_static"]
+htmlhelp_basename = "pyexampledoc"
+extensions = ["sphinx.ext.autodoc", "autoapi.extension", "sphinx.ext.napoleon"]
+autoapi_type = "python"
+autoapi_dirs = ["example"]
+autoapi_python_class_content = "both"
+autoapi_options = [
+    "members",
+    "undoc-members",  # this is temporary until we add docstrings across the codebase
+    "show-inheritance",
+    "show-module-summary",
+    "special-members",
+    "imported-members",
+    "inherited-members",
+]
+
+autodoc_typehints = "description"
diff --git a/tests/python/pyautodoc_typehints/example/example.py b/tests/python/pyautodoc_typehints/example/example.py
new file mode 100644
index 0000000..d1ffba5
--- /dev/null
+++ b/tests/python/pyautodoc_typehints/example/example.py
@@ -0,0 +1,7 @@
+class A:
+    def test(a: int) -> bool:
+        """Test.
+        Args:
+            a: Argument
+        """
+        return False
diff --git a/tests/python/pyautodoc_typehints/example/example2.py b/tests/python/pyautodoc_typehints/example/example2.py
new file mode 100644
index 0000000..1d0dd65
--- /dev/null
+++ b/tests/python/pyautodoc_typehints/example/example2.py
@@ -0,0 +1,7 @@
+class B:
+    def test(a: int) -> bool:
+        """Test.
+        Args:
+            a: Argument
+        """
+        return False
diff --git a/tests/python/pyautodoc_typehints/index.rst b/tests/python/pyautodoc_typehints/index.rst
new file mode 100644
index 0000000..5d8a591
--- /dev/null
+++ b/tests/python/pyautodoc_typehints/index.rst
@@ -0,0 +1,25 @@
+.. pyexample documentation master file, created by
+   sphinx-quickstart on Fri May 29 13:34:37 2015.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to pyexample's documentation!
+=====================================
+
+.. toctree::
+
+   autoapi/index
+
+Contents:
+
+.. toctree::
+   :maxdepth: 2
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
+
diff --git a/tests/python/test_pyintegration.py b/tests/python/test_pyintegration.py
index d9b6acd..cc8f0fd 100644
--- a/tests/python/test_pyintegration.py
+++ b/tests/python/test_pyintegration.py
@@ -834,3 +834,25 @@ def test_string_module_attributes(builder):
         "        </details>",
     ]
     assert "\n".join(code_snippet_contents) in example_file
+
+
+class TestAutodocTypehintsPackage:
+    """Test integrations with the autodoc.typehints extension."""
+
+    @pytest.fixture(autouse=True, scope="class")
+    def built(self, builder):
+        builder("pyautodoc_typehints")
+
+    def test_renders_typehint(self):
+        example_path = "_build/text/autoapi/example/index.txt"
+        with io.open(example_path, encoding="utf8") as example_handle:
+            example_file = example_handle.read()
+
+        assert "(*int*)" in example_file
+
+    def test_renders_typehint_in_second_module(self):
+        example2_path = "_build/text/autoapi/example2/index.txt"
+        with io.open(example2_path, encoding="utf8") as example2_handle:
+            example2_file = example2_handle.read()
+
+        assert "(*int*)" in example2_file