I been working through my errors/warnings on Google Shopping, and slowly cutting them down.

And having fixed a large number of Microdata issues for Condition and Price I thought I would go for the missing image issues. It feels like I have to keep trying to fix the same issues!

And not changing anything else.

Anyway I noticed today that when I check any issue, and view the URL of the offending product there is a suffix now on the end of the URL...
For example this: www. mywebsite.com/productnumber1.html#fo_c=1765&fo_k=4dc0a1e1111e111 111e22222aa044d9&fo_s=gplauk

I have changed it slightly just in case the suffix gives out personal information.

So just wondering what this is? Why it would suddenly appear on all products in Google shopping?