Steps to reproduce:
- Install a German dictionary for spellchecking in your browser.
- Open any page in German Wikipedia for editing.
- Enter some words with umlauts.
Expected:
The spell checking works normal.
Actual:
VE seems to insert some invisible word breaks before the umlauts, breaking the spell checking:
Note that only the "ür" is highlighted.
If you move the focus away and back again, the spell checking is corrected for words already entered (as seen in the screenshot), but will be broken again for new words.
This doesn't happen in plain inputs, and not on non-VE content editable texts, so I assume that this isn't a Firefox issue, but a problem with VE.