A month ago I reported missing keyword for Filter in the FITS header. I shot more flats today and the same thing occurred - some files (a majority) were missing the Filter keyword in the header. (Causing WBPP to sort them as "no filter".

There was no response to my last post on this topic. Am I the only one? My flats are saved to my indoor laptop (client) rather than the Pi on the telescope. Camera is a QHY268M with the QHY FW3 filter wheel. Filters change as expected, filter name gets written to filename as expected, but only intermittently to the FITS header.

Anybody have any ideas on this? In this case all the exposures were short, in the neighbourhood of 0.05 to 0.12 seconds. (new flat source much brighter than expected - still experimenting)

This was with an updated Kstars - 3.5.8. Stable, Build: 2022-03-24T22:52:45Z