Update May 30: This seems to be resolved at least for me. If it persists with you, please contact us at email@example.com and we'll see if we need to reopen this issue to take another look.
I'm suddenly not getting subscribed to topics. I tested and all settings are correct which means there's something that I don't have access to that needs attention. I sent this to our IT staff to take care of and it won't be fixed until the new board comes in the first quarter of 2019.