[Q] Lollipop random reboots topic

Hi

I just got this phone for my wife and all is well, but I have heard that the Lollipop update is quite bugged.

We are experiencing random reboots.. With twenty or thirty minutes interval...
Is the random reboots a known problem for lollipop or is it just this phone being a candidate for repairs?

Any other bugs I should be worrying about?

All best and thanks in advance..

xda-developers