Reported sky angle changed on filter change

First time I have seen this. Using SGP After a filter change from blue to green the reported sky angle in the image file name (%as) changed from the correct angle of 270.56 to exactly 360.0:

FITs header also reports incorrectly as 360 degrees. ASTAP reports 451.56 degrees for the same Green frames, which is correct (same as 271.6 degrees). The camera angle has not changed.

Link to the log file:

SGP log file

Anybody seen this and know of a solution?