trouble commenting on any federated thread

I don't seem to be able to comment on any posts on other lemmy instances. For example https://infosec.pub/c/[email protected] . When I try to comment it just spins. I expected issues with lemmy.ml but I've now tried several instances and experience the same problems.

Also comments on many posts don't match what you see if you go directly to the remote instance to view the thread.

Is there some federation issue with infosec.pub?