I cannot get either to work correctly in this latest update in the last few previous ones.
When using the healing brush I get black marks that then disappear when i click elsewhere on the image. I also then get the message saying there are not enogh pixels.
When using the spot healing brush it will rarely smaple the correct area that I selected but more often than not I just get lots of white pixels outside the circular brush which just ruins the image. Most of the time it just never samples the correct area.