Not sure if this bug is related to a fix I was supplied by gVectors yesterday or something else.
https://gvectors.com/forum/wpforo-advanced-attachments/odd-thumbnail-behaviour/#post-21424
The Problem
This problem only impacts mobile phone browser viewing my forum. When going back a page, you get a flash of a user's avatar full-frame!!
Tested this on a couple of phones one using Opera and another using Chrome both exhibit the same problem. When going back a page, for a fraction of a second, a flash of a posts users avatar and then page loads perfectly fine, blink and you'd miss it. However it was not there before the update or the CSS code I was supplied yesterday.
It does not do it on desktop browsers nor when I size the desktop browser to emulate a mobile phone size and thus get the responsive layout. Which suggests its specific to mobile versions of the browsers.
Really odd, hoping you guys as ever know the cause and how to fix. Might it be related to the CSS I was supplied yesterday.
You can see the weird problem for yourself if you view a thread on my form and the go back a page. It happens consistently.
https://www.radios-tv.co.uk/community/
Many thanks for your help.
p.s.
If this is in the wrong section, sorry. I posted it here as I felt it might be related to the attachments fault and solution, I was given yesterday