Is anyone else having a mouse wheel issue with this website?

This happened before, but mysteriously went away.   Now it is back.

Basically, when I open a thread, and then use my mouse wheel to scroll down, then scrolling function locks up.   I can type, and click buttons in the thread, but I can no longer scroll.  When this happens I can't even scroll using the arrow buttons or the slider bar on the right.

I have found 2 solutions to this:  1) If I am typing in a thread, then if I CUT my typing and then PASTE it back in, it unlocks the scrolling.

2) If I am not editing a thread, then I have to refresh the page.

But, if I go back to using my mouse wheel to scroll, it locks up again.

If I ONLY use the slider bar on the right or the arrow keys, then I don't have this issue at all.

This ONLY happens with this website.  I have tested it out on many other websites and there is no issue.   I have tested it out in other programs and there is no issue.

Anyone else seeing this behavior?

Edit: I am using IE11.