For my AVX with the QHY5/SSAG autoguider I cannot get autoguiding with pulse guiding working. This is for Kstars 3.5.2.
What I see is as follows: RA forward n steps, RA reverse follows with n steps in the same direction as RA forward, then keeps going in the same direction with steps twice as large. It continues until it fails.
I tried this on numerous nights (thinking I was doing something wrong) with various step sizes and both smart and multistar autoguiding so it is very reproducible. Fortunately after I connected the ST4 cable and selected guiding via the QHY5, everything works fine.
There was an issue with Kstars / INDI and the Celestron mounts, I think we all reverted to ST4 cable guiding for a time.
This has since been fixed, would recommend you upgrade both your INDI driver and Kstars version.