xsetwacom non-functional after hot-plug

[shocksofmighty]

On a multi monitor display, monitoring mapping using the built in gnome tool or xsetwacom does not function if the drawing tablet is unplugged and reinserted. Essentially, the mapping only works if the tablet is plugged in when gdm starts. While verbose output does suggest that it is remapping, the remapping is not enforced:

... Device 'Wacom Intuos4 6x9 Pen stylus' (11) found.
... Remapping to output area 1680x1050 @ 0,0.
... Transformation matrix:
... [ 0.318182 0.000000 0.000000 ]
... [ 0.000000 0.875000 0.000000 ]
... [ 0.000000 0.000000 1.000000 ]

Kernel: 5.8.0-41-generic
Gnome: 3.36.8

[shocksofmighty (shocksofmighty)]

Note, this appears to be a result of every hotplug resulting in Mode being set to relative. Changing mode to absolute enables the mapping to work.