This is not a consistent problem, but one that happens a great deal and is very annoying. When trying to use the Overlay Paint Tool in the Develop Persona of my Mac version of Affinity Photo version 1.10.4, if I select an area with either my mouse or my Wacom Tablet, there will be an added straight line of selection shoot up from the selection. I then have to use the Overlay erase tool to remove the excess before applying basic editing.
I figure this is just a glitch in the version, but I'm wondering if it has been noticed by others so that Affinity can fix it in updates. Again, it doesn't always do this and I can't figure out a pattern on why it happens.