[shalmanese]

It doesn't make sense but there's also no way to fix it now. Once the Han characters were unified, there's no non-trivial way to ununify them.

[emodendroket]

To an extent that's true, but introducing national variant characters in addition to the unified ones would at least allow careful writers to avoid the problem.

[account42]

Exactly, this is not rocket science: Introduce variantes of the affected characters in unicode (either variant selectors or distinct codepoints, doesn't matter too much but variant selectors could allow falling back to the old context-based detection). Then wait for software to be updated to use the variants based on the input language. This allows the writer to verify the variant used which will then be the same in all contexts.