Event status changed to "tentative" when edited in Android app

[nhenningKGK]

Hello,
I noticed the following, but I am not sure whether it is a bug or not. I did not find any discussion on it here, however.

Problem / Bug:
The status of an event changes from confirmed to tentative, which is quite annoying.
I use both Thunderbird (140.7.0esr (64-bit)) on my PC (Windows 11, 64bit) and the Etar app on my Smartphone (Android 15) as calendar apps. Events are synced with Davx5 by the phone.
The problem occurs repeatedly, when I edit an already excisting event on my smartphone. After syncing, it appears with the status tentative in Thunderbird.

I am thankful for any help!