I’m sorry to hear you are experiencing difficulties.
Unfortunately our support for older web browsers tends to be limited and, if I’m not mistaken, the final release of Internet Explorer 9 was in 2011 which makes it a comparatively old technology at this point.
To confirm, do you find it is only Internet Explorer 9 (and perhaps even older editions of IE) that are impacted, or is it a wider problem than that?
I’m sorry to hear that. Again, IE9 is sufficiently old at this point that our support is going to be very limited in this regard.
That said, I’m interested to know if this is a problem even with a default theme/no other plugins but our own running (I see you indicated having run through those steps when you opened this topic) – as though this may well occur even then it’s also possible that it is the result of a conflict somewhere along the line, albeit one that only shows up in IE9 or earlier.