Mutant Battle Arena is throwing all sorts of errors with the skeleton & wither skeleton

Partner Rank: 4

Verification builds: Beta 1.12.0.2 release 2039725

Summary: Mutant Battle Arena is throwing all sorts of errors with the skeleton & wither skeleton

Impact: The map seems functionally fine, the skeletons arms move a little weird but it certainly isn't broken. Seems that the bigger issue might be something underneath.

Repro Steps:

• Download the world Mutant Battle Arena from the store
• Open it
• summon a skeleton or wither skeleton

Observed Results: The errors will pop when the map is opened. The skeletons arms move differently to how they used to, but it's basically fine.

Expected Results: The errors shouldn't pop so obviously somethings going on.

Screenshots/Videos attached:

Regression builds: 1.11

Notes: This is what shows in the content log:

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton | bones | [2] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton | bones | [4] | mirror | mirror | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton | bones | [4] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton | bones | [5] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton | bones | [6] | mirror | mirror | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton | bones | [6] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton.wither | bones | [2] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton.wither | bones | [4] | mirror | mirror | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton.wither | bones | [4] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton.wither | bones | [5] | reset | reset | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton.wither | bones | [6] | mirror | mirror | unknown child schema option type. Allowed types: 'bool'

16:49:36[Animation][error]-models/mobs.json | geometry.skeleton.wither | bones | [6] | reset | reset | unknown child schema option type. Allowed types: 'bool'