I've been using this program for 2 days on windows 10 without rebooting, with a vertical taskbar and I've faced a recurring issue: my task icons are getting randomly and silently rearranged from time to time in the background for no reason. The only thing I was able to notice is that the rearranged windows appear at the end of my taskbar, all together (i.e all windows belonging to the same app). And they don't keep their initial order even relative to each other.