Frustrating Tabbing issue

I’ve got a response document with a few richtext fields. None has “pressing tab key moves to next field” checked. Still, when I press the tab key, the cursor moves to the next field. Cntrl-Tab works but still…

It may seem minor but my users are very frustrated with this issue and I can’t seem to figure out why it’s behaving this way.

Would appreciate any hints.

thanks!

clem