Talking [Q] Strange issue during Playstore downloads

I had my device updated to cloudstock 2.5 from ZVC after flashing the Kitkat baseband given in the forum and then to cloudystock.

Now having issues with playstore. I am not able to download apps , the downloads reach 90 - 94% and then it starts downloading again from 0%.
Hence I am not able to install apps from Playstore.

Tried factory reset and still not working.

How to solve it ?