If I leave Houdini and the IPR open when my Mac Pro goes to sleep, the next time I resume my Mac Pro and perform a render, a watermark appears in the IPR. If I go to the License Management screen in options, everything looks normal. Note that this issue doesn't resolve itself even after starting a new IPR session. I have to relaunch Houdini for the problem to go away.
A. macOS 10.15.6
F. Plugin version 2020.1.3.0
G. Houdini 18.0.499