A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
HOT OFF THE PRESS....
The product team have identified a possible way to avoid this problem.
They are currently testing it but have given me permission to suggest it here too, so that you can see if it solves the problem for you.
File > Options > Advanced > General : uncheck Enable multi-threaded processing .
Please try it and let us know whether or not it avoids the problem for you.
Thanks for your patience (as they say).