In Photoshop CC 2019, using a Wacom Intuos Pro with latest (or older) drivers. Open the CC Library from Window menu. Attempt to move things from Library to artboard, or move things in Library. Doesn't work. Pen is useless for operating library.
Seems Photoshop is misreporting the location of the pen.
Am finding the same problem after deciding to use Wacom Intuos CTH-480 with updated drivers. Want to use the pen tool to mask out edges and simply cannot.
And what are you gonna do about it? The post is 2 years old and didn't have any resolution. I have kind of similar issues but posting here seems to be useless...
Sorry. This one has been on eng backlog because they're rewriting extensibility for panels (CEP > UXP). When that change is made, this issue should be addressed.