After spinning up a free instance, the site starts a loop of Disconnecting and Rejoining. I say loop because is drops about every 2/3 minutes. I have been using the free service way before your go live and never experienced this before.
The free is site of course is running Oqtane, so I want to start ruling out somethings out before I deep dive.
Also important to note all my Live production sites are running just fine with no problems.
BTW
Oqtane 6.2.1 is the last official release on .NET 9. The next release will be Oqtane 10 which will coincide with .NET 10.
Regard.