We found out this morning that the auto-complete feature when filling a field (in create issue screen for example) is now case sensitive. This means unless you upper case the first letter for most of (our) fields, it will not find what you are looking for, but suggest other options with the letters in lowercase in it.
It use to be this 
And now we get this

which we find quite counterintuitive...
Is this a new bug or a feature?