I just started using Public Beta 3 on my 12.9" iPad Pro a few days ago and so far it seems fairly stable with the apps I use. I have, however, found a bit of weirdness when using the Files app with USB Flash drives and SD cards. When I copy files from a drive or a card to an iCloud Drive folder everything seems to work but I find that the files are not copied onto the iPad rather they are uploaded to iCloud and need to be downloaded back down to my iPad before I can use them there. If my iPad is offline the files seem to be downloaded but you can’t use them until you connect to iCloud.
Is anyone/everyone els seeing this?