Blacked out lines for no reason

[Justin2600]

Some lines (wires) and pins are getting black for no reason.

• Affected pins cannot be activated and are, by default, disactivated
• Some affected lines prevent the block the are
  connected to from being deleted, some just stay there, and some can be deleted. All of the lines do not function properly when black.
  I have no reason why it happens, but it seems to affect only one 'block' at a time. It happened to me one multiple occasions. I restarted the program, it was fixed. I just wanted to report it in case it happened to someone else, I'm curious.
  

[Mukhash2012]

This is still not fixed. But to prevent that bug to occur you should switch between chips or projects much slower instead.