Hi @RaonyO, I think what you're experiencing is similar to what I explained in your other post.
The current behavior of rule actions is that a single action (i.e. slack, webhook, etc) will be triggered for all the alerts generated during the "action frequency" timeframe (i.e. on each rule execution, hourly, etc) If, for example, you selected "on each rule execution" for action frequency and the rule executes and generates 10 alerts in that rule execution, then a single rule action will be triggered and will contain 10 alerts in the context.
In future releases, we're looking into adding additional flexibility to rule actions and giving users the option to trigger one action per alert generated. Hope this helps!