Undo in atto leave the input point at the start of the content

Steps to reproduce:

1. Start writing a forum post.
2. Type 'Moddel is'
3. Use arrow keys or click to put the input after the first 'd' (Mod|dle is)
4. Press delete twice (by mistake). (M|dle is)
5. Realise you mistake, and so press CTRL+Z to undo.

Expected result: Input point us after the d (Mod|dle is)

Actual result: Input point is at the start of the input (|Moddle is)

This is very disconcerting becuase it is hard to notce what happened, and if you continue typing using your muscle memory, weird thigns happen.