Reproduce:
Normal:
There are two valid entities. Both A and B are in overworld.

this.applyComponentChanges(B, this.getComponent(A, "minecraft:position"));

B will be teleported to A.

Bug:
There are two valid entities. C is in the_end and D is in overworld.

this.applyComponentChanges(D, this.getComponent(C, "minecraft:position"));

D will not be teleported to C!

The scripting engine lacks API about dimensions! Not only "minecraft:position", but also commands, ticking areas, blocks and entity queries will be buggy when the case involves dimensions.
Too many features are hard to implement without the ability to interact with dimensions. Don't tell me this is not a bug.