V10.10.0 New expression editor jumps always to the end of the text

In 10.10.0 Expression Editor issue: When typing in a new Character in the middle of a text it jumps always at the end of the text.   Actually it's unusable to type in more than 2 characters in a row when try to change something in the middle of an expression.   This never happened in the versions <10.10   Any ideas to solve that ?
1 answers

This should be solved in 10.11