Deselecting selected elements also deselects objects in collapsed artboards in the layer panel.
I'm posting a video showing the problem:
Affinity Designer 2020-07-06 13-37-19.mp4
First I press ctrl + a to select all objects
Then I click on objects while holding down ctrl+shift to deselect a few of them and leave the rest of them selected
Next, I press ctrl + a again to select all objects
This time, I'm deselecting objects while holding down ctrl+shift but this time I'm clicking on layer panel (in Artboard1 EDITED)
Here comes the problem.
All objects that are located on collapsed artboards in layers panel are being unselected (!).
Only those that were on the expanded artboard (Artboard1 OPENED IN...) stayed selected.