Nothing solid yet, I reached out again to Qolsys again today.
We had a similar report from a user a while back, where 2.5.4rc19 was causing an issue. I’m not sure if this was an identical experience, but a firmware update on the main panel resolved the issue this user was experiencing. I have linked the relevant description of what they did above.
Just in case the wifi page is not showing accurate data, are you able to determine in your router if those Remotes are connected?