Event receivers (RER) not triggering

[NaffOff]

Recently I am not able to create (remote) event receivers in my SPO environment(s).

Create new site
Create new list
Add event receiver using PnP.PowerShell
Add-PnPEventReceiver -List "test" -Name test -Url "https://webhook.site/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" -EventReceiverType ItemAdded -Synchronization DefaultSynchronization
Noting is triggered on the listener. Tested on different tenants and with different listeners (webhooke.site and Azure Function).
Works fine with webhooks on lists, but that is not an option due to the expiration.

Anyone else facing this issue?

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[github-actions]

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