I have been unable to update my behavior packs (no gametest necessarily) since 1.19.11, although, there were a workaround; install the world, upload the packs offline, and upload this world again to your realm. That worked just fine till 1.19.20, I can’t update my behavior packs in the realm anymore, but now I can’t also update the resource pack.

Steps to replicate:
1. Upload an addon (RP/BP) to your realm
2. Change the version of the addon to a higher version
3. Enter your realm settings, and verify that the addon has been successfully changed of version

Expected results:
The addon will be uploaded with no issues and after changing the version, it will be changed in the realm after step 3 and everything changed, added, or removed will be applied in the realm.

Obtained results:
Enters you into an infinite loop of “Uploaded pack successfully”, where the only way to get out of it is closing the game in the realm settings, which reverses the changes that were attempted to be made.