About once a day, Revu 21 fails and puts gibberish in the display area. It happened with 21.4 and now it's happening with 21.5. It usually comes up when I have several documents open at once, but sometimes it's just 1-2 documents. Sometimes it resolves by exiting and restarting Revu, but sometimes it takes a full reboot. It happened some on my old 2017-era Dell laptop, and now it's happening on my new Asus laptop, which is fairly robust, so it probably isn't the machine.
