Achievements not unlocking in Minecraft Bedrock Realm after update 26.50/26.52

Brief description:

Achievements are not unlocking in my Minecraft Bedrock Realm after the recent Bedrock update. I did not enable cheats or use hacks.

Steps to reproduce:

1. Open Minecraft Bedrock on Android.

2. Sign in with my Microsoft account.

3. Join my Minecraft Bedrock Realm.

4. Play in Survival mode with cheats disabled.

5. Complete a simple achievement requirement.

6. The achievement does not unlock.

7. I removed all active third-party add-ons and behavior packs.

8. I created a copy of the world without any add-ons.

9. Achievements still do not unlock.

10. I also tested a simple achievement in a new clean Survival world, and it still did not unlock.

Expected result:

Achievements should unlock normally when their requirements are completed in Survival mode with cheats disabled.

Actual result:

Achievements do not unlock.

Additional information:

This is a Minecraft Bedrock Realm. I have never intentionally enabled cheats or used hacks. The Realm previously had third-party add-ons/behavior packs, but I removed them completely for testing. The problem continued after removing them.

Please investigate whether the recent Bedrock update incorrectly disabled achievements for my Realm or world.