OP posts highlighted when reposting

Just did a bit of checking on laptop and iPad as well as phone. If on mobile site, and logged out , OP’s responses are highlighted in green. However, once I log in, the highlighting disappears. On desktop site, no highlighting whether logged in or out.

... though one device is highlighting it in green, and the other in pink!

Only the OP's first post is highlighted on my phone and my tablet, regardless of whether I put view on the mobile or the desktop site.
I haven't tried on my laptop, as I rarely switch that on these days!

Op highlighted in green on my phone. My computer says I don’t exist on GN. I could sort it, but why bother.

It works on neither desktop or mobile for me Ro we ve been through this so many times

Never has worked for me and it’s a blooming nuisance

Works on mine - always.
But I think there's 2 versions - desk top & another. - As I found when I accidentally clicked on something a while back.

Scroll down, the last word at the bottom of this page, on mine says 'desktop' in blue so think this probably takes one to the alternative?