We seem to be experiencing inconsistencies with the 'invite to watch' functionality from channel assets, interested to know if anyone else is experiencing this?

I would expect the notifications to be sent at the time of event however, sometimes it’s taking longer than an hour to hit peoples inbox. With this in mind, I am currently having to invite my manager to watch all content that I send to the customer because I don’t know when they’ll actually receive it. I’m wondering if the events falls into a queue of jobs that run sequentially? Maybe certain times of day tend to be busier than others? 

The invite to watch notification is something that we are keen to use heavily for proactive engagement as well as training support. For example, if a customer emails in with a question and we have an asset that walks through it, great invite them to watch. However, right now we see some come through immediately and others taking almost an hour. Has anyone else experienced this?...it doesn’t give us the confidence that we need to hit SLA’s for Tier one clients. 

Appreciate any insight the community has!