Rise Image Gallery Block Not Working

Hi and Happy Thanksgiving to all! I am having the same issue as Brian. Image grids are not rendering properly in Preview mode. This phenomenon began about 2 days ago---even though the same file has been rendering properly for months. But now, image grids look fine in Edit mode, but become either massively oversized or dramatically undersized in Preview mode. ALSO, my Block Entrance Animations do not work at all. Whether they are turned on or off, they do not work. This too happened only just recently, a couple of days ago.  Thanks to Brian's and other users' comments above, I at least now have a workaround for the grids issue by turning those entrance animations off. But now I must tell the client that I had to turn all animations off in order to work around the Rise image grids bug. Not great. We know that the image grid issue is related to the entrance animations. So, can't this be fixed? Please help.