V3 driver was able to show the side of pier with CEM25p, but it could not correctly work(there was time out recorded in the logs) ie the mount was not pointing north in Kstars.
I have another query : PHD2 says ra/dec guide speed as none , is this Indi issue?
Looks like t Kstars 3.0 with the new drivers solved this issue with the iEQ45 Pro. It now re-calibrates by itself after the flip and continues guiding and the capture module. Not sure if side of pier is still not available with the ioptron driver but at least the meridian flip is now fully automated with pHD. Very pleased! Thank you!