Opening photos

[Pete Clegg]

I'm using Gimp 2.10.30 on a Windows 10 system and having trouble opening images.  They open at seemingly random scales, sometimes tiny on screen and sometimes massively zoomed in.  I can immediately resize them to fill the screen with ctrl+shift+j but still it's a bit annoying and a problem I never had with any previous Gimp version.

Thanks in advance if anyone has a solution.