I was about to say I didn't think it was FP problem. I didn't realise it was a Google update that was causing the issue and did a hard rest last month to try and fix the problem. I found that it worked fine until google play updates.
I found if I uninstalled updates to Google play the icons were fixed, but as is the Google way, it just updates itself again.I assume they will fix it when they update next, but in the meantime just means we are stuck with ugly looking icons.
I wondered if there are any settings that FP can tweak to resolve this though.