Calc is VERY SLOW at loading new file. But fast with .xlsx File! [ARM, Win11]

It started a few days ago.

I am stuck at loading an existing file for 10 seconds. Opening a new file is instant.
If I save the file under xlsx format, and open it, it’s also instant.

It’s only for Calc. Writer opens files instantly.

I am on Windows 11 Arm (surface Pro). I tried the last Libreoffice version (25) and also December version.

Please paste here the information on Menu/Help/About LibreOffice (There is an icon to copy)

Maybe you have assigned a printer to the file, and that printer is not available when it is opened.

Thansk for your answer. About the printer, what do you mean by

you have assigned a printer to the file

It’s not for a specific file. If I launch Calc, save a new file (without writing anything inside) and close and open it again: the loading is very slow. I didn’t assigned any printer at that point (for what I know).

My configutation:

Version: 25.2.1.2 (X86_64) / LibreOffice Community
Build ID: d3abf4aee5fd705e4a92bba33a32f40bc4e56f49
CPU threads: 8; OS: Windows 11 ARM64 (10.0 build 26100); UI render: Skia/Raster; VCL: win
Locale: en-US (C); UI: en-US
Calc: threaded

Can you share the file?
.
On a bit older versions 7.x I could speed up loading time by replacing optimal row height with a fixed height, but I don’t know, if this is different for xlsx.