For whatever reason, when using using Microsoft’s Remote Desktop Android app on my cheapo Chromebook to connect through the corporate firewall to my day-job computer, I experience significantly less frequent timeouts than when connecting from my Windows 10 laptop. Windows disconnected after 5 minutes of inactivity. Chromebook disconnected only after a much longer time, although I haven’t gotten around to measuring it.
What I suspect is that company policy forces the frequent timeouts, and is more successful doing so when the connecting OS is Windows.
It could be something else, like default settings that I do not know how to access.
When I bought the Chromebook, I thought of it purely as a web-browsing device. Its winning combination of versatility and stability has surprised me, with the added support for Android apps (not that I use that many, really preferring the web interface, but those few are really helpful), and for printing.