[Q] Nexus 6 Google Now not working on public wifi after rooting. Please help! Thanks. topic

I recently unlocked rooted and decrypted my new nexus 6. I was happy with how it performed after this, until I was using it on public wife networks like cafes. Everything seemed to work fine except Google now wouldn't load searches this applies to voice search also. I think the play store wouldn't load as well. Everything works on my home wifi network and on my network data. I have locked it again and gone back to encrypted stock, however despite factory resetting the problem remains. I managed to make the text search and play store work on these networks by skipping all the setup options and setting things up in the phone. However voice search isn't working just loading and eventually saying can't load, and text search works but there is a blank white area above all the links which makes it look like there is a problem. I think while setting up the phone I flashed the decryption boot.img into the boot loader partition by mistake. This seems to be the step that I did wrong and may have caused a problem. Any advice on how to fix this or what might be the cause would be massively appreciated!
Thanks