Slack notifications are delayed by multitple days

We are constantly getting old notifications for error / crash events that happened 4 days or even longer ago. It only happens with slack. Whats interesting is that from what I can see all new events come up almost instantly.
We have configured a 1 hour limit for each error in the slack integration.
E-Mail notifications also seem to be fine.

I’m assuming this is self-hosted? If so it’s likely that your queue is backlogged significantly. If it’s on please email support@.

It’s actually on
I’ll message the support team thank you!