My environment is still running Horizon version 7.10 (working towards an upgrade) and we are experiencing the same issue. However users are reporting their screens turning black for a few seconds then reconnecting back into their session. Same issue with a slight pause before the disconnect occurs at random times some days but all users seem to experience it simultaneously from what we have been monitoring.
It is only affecting users connecting from the internet. A difference being we have provided all remote users with full Windows PC's with Horzion client installed for access to the VDI. We verified all users have at least 25mbps internet connections and all are using the blast protocol. I was also inclined to blame ISP's, but now I am not so sure.
Our issue started around the October 2022 time frame and have had VMWare support involved as well.
Has anyone had relief and can you share what was done?