Update multiport.md (#272)

Added more verbiage for the Aimos KVM's for clarity

pages/multiport.md

@@ -6,6 +6,7 @@ Also, Pi-KVM can be connected to a multi-port HDMI/USB switch and the switch's b
 
 If your KVM switches channels using keyboard shortcuts, there is a chance that it will not be able to work with OTG (v2 platform, see below), since it does not fully implement the USB stack. In this case, you will have to [use an Arduino board](arduino_hid.md) to emulate the keyboard & mouse (Pi-KVM supports this configuration).
 
+❗WARNING:exclamation: - AiMOS has a back powering issue that makes the Pi behave differently, there is a work around [here](https://github.com/pikvm/pikvm/blob/master/pages/Community_FAQ.md#misc-stuff)
 # List of tested KVMs
 Here the status is:
 * ✔ - Everything is working as expected. There may be some subtleties.