Achievements remain disabled on a world after removing all behavior packs

what happened:

achievements are disabled on one of my minecraft bedrock worlds, even though i have never intentionally enabled cheats or experiments on this world.

the world is currently a copy of my original world, and i have been playing on this copy normally. i have checked the world settings multiple times and confirmed that cheats and experiments are disabled.

i also tried disabling/removing all behavior packs from the world, but achievements are still disabled.

however, when i tested the same behavior packs in a different world and removed them, achievements became available again immediately. this makes me think the issue may be specific to this particular world.

what i expected:

after disabling all behavior packs and making sure cheats and experiments are disabled, achievements should become available again if the world otherwise meets the requirements.

what actually happened:

the world continues to show that achievements are disabled, even after all behavior packs have been removed and the relevant settings have been checked.

steps i tried:

checked that cheats are disabled.

checked that experiments are disabled.

removed all behavior packs.

restarted minecraft.

made copies of the world and tested the same settings.

tested the behavior packs in another world.

confirmed that achievements became available again in the other world after removing the behavior packs.

the issue only persists on this particular world.

additional information

minecraft edition: bedrock edition

device: android

world type: existing survival world

achievements: disabled despite the settings above

i would really like to continue playing on this world while still being able to earn achievements, so i would appreciate it if this could be investigated. i believe this may be a bug rather than an intentional achievement restriction.