Hey @Dan C
Thank you very much for digging into this and trying to find a temporary workaround.
I had already tried using the upper numbers of keyboard and the corresponding point there, but it does not work on German, neither Spanisch keyboard settings. *At least for me...
Btw: I have the comma of Numpad set as a point, as I never use the comma. Though it doesn't work like mentioned above.
Also installed the English keyboard setting and tried, but it doesn't make a difference. Restarted Affinity Designer and the PC. NO change.
I eventually tried pasting the values of 5.125 and 8.25 in all three settings , but still, no luck....
I'm out of ideas.
I have also tried all possible settings to recording the issue, but the stupid Game-Bar in Windows only records the Affinity background screen, not the actual window in which the project settings are made. Have spend at least 2-3 hours on this for nothing... What program do you use?
...at least I could help getting an unknown issue to be worked on and hopefully solved in a near future..