UndoManager doesn't persist meta about yjs

[dmonad]

The meta property is intended to store information about the "before-state" that is required to restore exactly that state. One example would be to store the cursor position that should be recovered when undo is triggered. When you undo several undo-items at once (e.g. because they are merged), you usually only want to recover the first meta state.

Hence, we intentionally discard the meta properties of stack items that are merged. Only the first meta generated should survive.

There might be an argument why stack-items should be merged. However, this would be confusing to most, as the first stack-item created should always be the "authority". I suggest that you store all relevant information on all meta states.

If this seems unfeasible to you, can you please explain your use-case?