I have made a topic about it a year ago. Had the same problem at the time.
Raising more than stack
I don’t type the value in any longer. So this bug doesn’t bother me anymore.
It’s a bit sad that this still hasn’t been fixed.
I can only offer you a tip, that has been offered to me at the time. You can click right or left of the slider on the slider bar. That increases or decreases your bet by one big blind.