Like this you mean…
If you can do the clan chat thing and get a positive result, but also do the clan chat thing and get a negative result, that proves that doing the clan chat thing does not guarantee a positive result.
You might find this later post, in the main thread, more relevant…
So, absolutely nothing to do with clan chat, and everything to do with which of the servers in the EU farm your game happens to be hosted on. It seems only 2 of the 6 servers are recording.
This certainly sounds very plausible, especially as the Blizzard stated reason we had issues with the double-bounties buff not always being available was due to something not having propagated to all the servers in the EU farm.
In other words, some of the servers are busted, some aren’t. This would also possibly explain why sometimes your “retrieving hero list” is immediate, and sometimes takes 15-20 seconds, i.e. depending on whether you’re on a server in the farm that’s not working right or not.