Thank you for your post!
I actually just sent you a private message about this as I saw your previous report before this.
I am unable to reproduce the issue on that or any response.
Can you confirm if this persists today?
Can you try this with a different browser?
Yes, the same issue continues today.
Thanks. A few more clues. Or, maybe not clues, but at least, descriptions of observed behavior.
Sometimes when the issue occurred, I was able to post a response from an iPhone or iPad.
Sometimes, the same problem occurred on the i-device.
On a few occasions, after successfully posting from the mobile device, I would also be able to post from desktop Mac/Safari.
Then eventually, the problem would occur again.
Addendum: earlier this morning, got the same problem; as I mentioned
But just a minute prior to this note, I started a reply and did not get the "loading..." problem.
I did not proceed with an actual reply in that thread. But apparently it would have been possible.
So the problem has temporarily (?) vanished.