After using Desktop Editors for several days, characters are no longer displayed correctly

I use
ONLYOFFICE: desktop editors: 9.0.4.50 (x64 exe)
OS: windows 10 Pro 22H2

After using Desktop Editors for several days, the text in the spreadsheet appears as a rectangle.

Also, the text in the table in the document disappears.

Hello @nishigaki

Do you mean that the editor was never closed during that period?

Hello @Constantine

The application was not closed, the two tabs in the pictures were still open, and I opened and closed several other tabs.

Just to clarify my understanding – all tabs were opened for several days, but only two of them (on screenshots) became looking like that, is that correct? I’d like to understand the tabs management for these days to reproduce the issue. As of now, the scenario is not quite clear.

By the way, was your device in standby mode (sleeping) in that period?

Hello @Constantine
The device is always powered on.
The two tabs have been open for over two days. I’ve opened and closed several other files over the course of several days.

The conditions that have occurred in the past are as follows:

  1. Editing 2 to 10 files at the same time.
  2. Occurred after using it several days.
  3. All the text on all tabs disappears.
  4. If I open another file, the characters are not displayed.