In response to a case that had been risen with Meraki Support, I will be providing a place to look as this may be a bigger issue for some MR networks as more schools may transition into iTopia RDP VM sessions for high powered apps.
Overall, the problem was a black screen while RDP'd into the VM for an iTopia session. You are still able to operate some basic functions of the session, however the video encoder information shows blank.
The fix and reasoning behind this issue on only Meraki APs - Make sure you have L3 Roaming disabled.
As of now Meraki MR APs have a constant known issue with:
Sporadic packet loss & instability on Layer 3 roaming & Teleworker VPN SSID's (Wi-Fi 5 Wave 2 and Wi-Fi 6 APs)
This looks to be exponentially more apparent with STUN protocol data coming through the APs.