Issues with the update if there is not enough space, maybe during the update.
I had the following issue last week: after starting the PC and PA Platform, the updater for potable Firefox was started. At the same time the Firefox update was running, the other updates, like OS updates, also kicked in. So there was not enough space for the Firefox update, but there was no error message from the updater. As I started Firefox afterward, the platform informed me about an incomplete installation of Firefox and suggested I manually download it again.