Icon pack resetting when folding phone

I am able to successfully apply and change the app icons (e.g., using the "Sticker" icon pack) while using the device. However, as soon as I close the larger inner screen of my Fold 7, the launcher reverts to the default icons on the cover screen. ​Steps to reproduce: ​Open Niagara Launcher settings on the unfolded main screen. ​Go to Themes -> Edit Current Theme -> App icons. ​Apply a custom icon pack. ​Fold the device (close the larger screen). ​The icons on the cover screen revert to the default ones instead of keeping the custom changes.