Well it happened again. This is/was a 4 panel Mosaic of IC405. Seems 2 panels would like me to believe I captured a gateway to a worm hole! 
This is the second time this has happened. Guess I best check on the APP forum to see what causes it.
Gain:  101
Offset:  50
Exposure Time:  240 seconds
Camera Temp:  -15°C
Camera:  ASI533MC P
Offset:  50
Exposure Time:  240 seconds
Camera Temp:  -15°C
Camera:  ASI533MC P