Nvidia GeForce GTX 1050
Hardware acceleration was active on default and the patch tool didn't work. When disabled, the patch tool works.
I had 3 different issues with the patch tool:
1. When selecting the area and clicking away to confirm I get lines across the selection and some strange noise in the histogram.
2. When selecting the area and clicking away to confirm I get a black patch in place of the selection.
3. The patch tool works more like a hard stamp tool.
I hope it's visible on the screens attached.