Ananiujitha I can't log in and test the posting behavior on staging.
Login is the same as this forum
The tag list animation still occurs on both versions.
I suspect you mean that it moves at all? There shouldn't be any transition time which the fix above addresses.
That leaves two options, having it always be extended or hide it.
Unfortunately, having it always be extended runs into a functional problem of long titles and many tags overlapping each other.
Hiding it on my side means there would be a loss of info that may be useful to some.
However, if it affects you, you could hide it and not have to deal with them at all.
ul.DiscussionListItem-info li.item-tags {
display: none;
}
ensete recommends Stylus, it might be worthwhile to have a public stylesheet that we could refer to that removes these for those who are affected.