Taskbar profile icons missing

For some reason, on my main PC (Windows 10) the icons for different profiles are not displayed over taskbar Firefox icons, while on my laptop (W11) it's properly displayed. Previously I've used Brave with multiple profiles and profile icons were properly showing on taskbar. I'm not sure if it's related to system version or some settings, I would greatly appreciate any help as this makes it hard to work with multiple profiles open at the same time. On the topic of profiles, I would like to suggest two handy changes: 1. separating windows on taskbar by profile would be helpful, like in Brave, where all profiles are not glued together as single row of icons on taskbar. 2. Changing browser icon by profile (the fox icon that can be changed in Appearance settings), they more larger and easier to differentiate, especially as profile icons are all white.