Crash on Fail to Unlock

If you have homing and limits enabled and you fail to unlock GRBL with $X  (possibly home too) before trying to stream a file you crash the gui. It does not always occur. However, if you click "stream", say, 5 times a crash will occur on any of the 1-5 attempts to stream the file.

You also get a crash if you try to soft reset grbl while a program is running / streaming.
