Here is a bug I am experiencing.
I add a Table with custom text. Once I start typing the text it doesn't show me what I am typing.
For example: I press letter T. It won't show up until I hit the next letter.
I type TA
I see T
The issue usually with the last letter in the word. It doesn't show up when I hit space.
It looks like a clear bug to me. Unless it's a new feature. I tried Creo 3.0. No issues with typing.
The problem is all my new models are done in creo 4.0 and I can't make a drawing for them in creo 3.0.
Probably a graphics issue. Try setting "graphics win32_gdi" in the config and restarting Creo and see if the problem perists. If it works right with that setting you may need an upgraded video card or a more recent driver.
Found one of the articles reporting for the same on windows 10 https://www.drivereasy.com/knowledge/4-easy-fixes-for-keyboard-lag-in-windows-10/