I cannot understand your sentences.
IIRF does not change HTML. Ever. It's not possible for IIRF to change HTML.
Thsi is why I say it is a side effect. It is definitely not IIRF that is changing the HTML. Something else in your system is changing it. IF you see the problems only when IIRF is involved, then the problems you are seeing are a side effect
of your use of IIRF.
I don't know ajax.updater. I don't know why there woudl be a side effect. That's what you need to find out. I can't really help you with that.
I think you're asking in the wrong place.