Version: v1.3.1 Flatpak
OS info:

Issue:
When applying images to sourcemods via Boop, the images are applied to the wrong mod. It's seemingly consistent what mod in Boop connects to what mod in Steam. In the linked video, I attempt to apply images to Underhell, but upon checking Steam, the images have been applied to The Boss LVL instead. No mods are added or otherwise changed, they just seem to be out of order.
Video: https://youtu.be/wlC4c2XurvY