Comet 168P via Itelescope T5

This is a recent view of Comet 168P via Itelescope T5, using a R-filter and 45sec frames.
I am not sure what the little flash is about. It is part of the raw image data, and still visible in calibrated images on the right hand side. I don't think it is part of the comet. Could be a cosmic hit on the sensor or perhaps a micro meteor burst? or a strange internal reflection?