Help with Calc not responding

On some spreadsheets, when I hit “enter” or “save”, the monitor goes pale. the little blue circle starts rotating and it freezes up. If I hit delete, I get the message, “not responding.”. When I restart, the original spreadsheet comes up with without the changes, Then the whole procedure repeats.

Can you help? Not ALL spreadsheets.

Art

Please post your LO version, your system, and best also a small calc file showing the symptoms