On a phone, the tabs of a niche had no room left in the top bar and disappeared. They now get their own row you can swipe, the creative board shows two videos per row, and the bottom bar fits all of its icons.
With DropUGC open in two tabs, both could try to renew your session at the same moment, and the second one signed you out everywhere. Tabs now take turns, and a tab that finds a fresher session simply uses it.