First keypress are repeated multiple times

[Jan P DK]

Working with MS Project. When creating a new task and then trying to type in the either the successor or predesessor then the first keypress is repeated multiple times (not less than 5 times, but have been seen up to 15 times). So having a task with id 400 and it's predecessor is 399, then typing 399 results in 333333333333399. It's the first keypress no matter what key, this includes the "Enter-key" - this has not happened before in earlier versions. I can't use this version.