Obligatory debug information:

VRCSDK: VRCSDK3-2019.12.14.17.08

UdonSDK: UDONSDK-2019.12.14.16.56_Public

Upon closing and re-opening the Udon Graph editor, the "VRChat UDON Alpha" watermark will start rendering ontop of all previously made nodes, this can be temporarily solved by selecting the nodes individually.

Relatively inconsequential bug, but figured I'd make note of it.