a tap on the new layer button with the pen almost always creates lots of layers at once eg:

Click image for larger version. 

Name:	2018-06-14 18_41_32-Xara Designer Pro X - [XXP_Introduction _].png 
Views:	130 
Size:	59.7 KB 
ID:	121396

sometimes some of the new layers are copies of themselves... and copies of copies...

my wacom drivers and windows 10 are both the latest versions [wacom 6.3.30-2 and windows 1803 17134.122]

it happens in xdpx11 and 12.6 and 15.1 [trial]

it's a while since I used cintiq with xara, usually I'd use a mouse to create layers, but i think this issue is not new....