Update May 30: This seems to be resolved at least for me. If it persists with you, please contact us at firstname.lastname@example.org 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'm sending this to our IT staff to take care of. Sorry!