See pics
pre: Using the pencil I entered the cc7 value node. ( straight line)
post: I delete the node & this erratic line appears . I can’t delete/ erase it.
-use the pencil again I get the single node & straight line. Try to erase & again the erratic line is back.
Select region+delete, eraser etc. doesn’t do anything.
Must be a setting I’ve never used before, any clues would be appreciated.