Thanks everyone. I got it working.
What did I do?
1- Adjusted trigger=5w and hysteresis=0w
2- Restored device connection in Isy
I am not sure if both 1 and 2 were needed but I did both and it works fine now. BTW, no calibration was done (Tried with and without calibration and didn't change the problem of isy not getting update. In fact, syncrolink worked fine without any calibration assuming I manually queried the device. I think it must do some sort of autocalibration but I can't be sure.)