fix 3711 anyOf/oneOf remove old fields from previous schema

[cwendtxealth]

Reasons for making this change

Fixes #3711 - removing old undefined fields when switching to different oneOf/anyOf schema

Checklist

• [ ] I'm updating documentation
  • [ ] I've checked the rendering of the Markdown text I've added
• [x] I'm adding or updating code
  • [x] I've added and/or updated tests. I've run npm run test:update to update snapshots, if needed.
  • [ ] I've updated docs if needed
  • [ ] I've updated the changelog with a description of the PR
• [ ] I'm adding a new feature
  • [ ] I've updated the playground with an example use of the feature

[linpc]

Hello, any update on this fix? Thanks!

[heath-freenome]

@linpc This is a very tricky problem that @cwendtxealth hasn't quite figured out how to fix yet.

[michal-kurz]

Hey @cwendtxealth, @heath-freenome , any predictions on when this might get merged? No pressure, but our workaround for this is giving us some performance issues, so we need to decide if it's worth optimizing.

[fdallmeier]

Hi @michal-kurz , would you mind sharing your workaround?

[Bonfims]

thank you all, just a doubt: it will work on conditionally remove a field with "if" without anyOf or oneOf?