I have the same problem on some pages but not on others, and sometimes on an auction but not all the time. I'll take another look when I get free time.
I'm on Windows 10 with Firefox default options so there should be no ad blocking unless it is flagged "dangerous or deceptive"
Involuntary autocorrect in operation on mobile device. Apologies in advance.
Batman: I don't think the title is relevant to the issue
Hah, there's a plethora of thread titles around here that are irrelevant to the issues concerned.