There was an important fix in v7.8 related to the autocomplete of #If / #End If blocks. In previous versions there were many cases where it added an extra #End If which caused the native code to get broken because of case changes.
As part of this fix, the autocomplete implementation of such blocks changed to only complete when it is guaranteed not to add extra closing clauses. In the case of #Region it currently never autocompletes.
You can see in v7.30 that whenever you press enter on a #Region line it adds another #End Region line. Even if there is already one.