New calendar events disappear after syncing with Davx5 and PurelyMail.com

[NuLL3rr0r]

I've used SimpleCalendar and Davx5 with an SOGo instance installed by iRedMail for many years and it has been working flawlessly. Recently however I've migrated my mail server to PurelyMail.com. I've created a CalDav calendar and exported my old events to an .ics file. Then once I setup SimpleCalendar and Davx5 to use the PurelyMail account and imported the .ics file on SimpleCalendar it worked.

However, after that, any new event I create will disappear. I've checked every setting on both apps there's nothing insane that does not make sense. It should be working. Maybe it's a PurelyMail issue, but I'm not sure honestly and don't know how to diagnose or address this. Also found that someone on #427 has a similar issue.