It now seems impossible to use the Select All tool in the map editor. Some blocks will refuse to get selected, no matter if you used Select All option or manually dragged over them. I tested this with a couple different maps and the problem is the same. This problem wasn't apparent before the latest update.
Hi Sapphiron,
Could you please give us more details on the issue & provide a video to show us what is the issue exactly?
Have a good day!