Why text does not appear in Calc cells?

Since I switched to Windows 10, and installed LO Version: text becomes invisible in Calc cells after hitting Enter. Then when I save the file, it appears.

This sounds like the same problem that appeared in this thread:

Now that tread says: Closed for the following reason question is not relevant or outdated by Alex Kemp
close date 2015-10-23 13:43:43.433880

Well, I uninstalled and installed Version: So far that seems to have fixed the problem.

But then I had to reset the default format to Microsoft xlsx to make File/Save or File/Save As to work without throwing an error.

Did you consider my answer in this thread?