calc is jumping rows cols

small spreadsheet with data 10 cols 100 rows. Has been working normally till yesterday.
Now it opens with max rows/cols, and dragging back bars will not hold to upper left.

Installed new mouse a week ago, and things were still fine.
old mouse has same row/col jumping problem.

closed and reopened many times. Have latest version of LO

Could you provide a bit more infomation? For example OS, LO Version, etc. Thanks.

If your are on LibreOffice <7:

If set, try to disable OpenGL in Tools -> Options -> LibreOffice -> View -> Category: Graphics Output -> Option: [ ] Use OpenGL for all rendering and check whether that fixes your problem

And than there is always the all time favoirt “Safe Mode…” you can try/check.