my experience with the SV305 has been poor as of late. it kept crashing whenever phd2 lost the star.
turns out it has some issue somewhere in the software and subframe. i am not entirely sure which software. but phd2 crashes whenever the guide star is lost. phd2 does not have subframe active. but according to gdb, whenever a star is lost, the frame received by phd2 is that of a smaller size equivalent to a subframe which makes it crash.
I think it is ekos trying to interfere somewhow. so i don't connect to phd2 from ekos anymore and all seems good.
if anyone has any idea why i am having this issue, please do let me know.