Is this with an older Firefox version maybe? I've tried with a relatively recent one and couldn't reproduce, but I'll look at the logs and try to fix this now that the HN storm has passed :-)
There's a writers maxim, "murder your darlings". what they mean is that a work often has some styling, phrases, exposition, even whole characters or subplots that the writer has worked hard on and become attached to, but that detract from the work as a whole. So they have to be removed. I think this may be a darling unfortunately.
I abandon all sites that override scroll because they're too frustrating to read.