I have a template with LLD that generates several triggers. I also have an item with a constant value (1). On the host attached to this template I have configured another trigger on the fixed value item but dependent on several of the dynamic triggers (LLD). When all dynamic triggers fire, the dependent trigger is fired also, that is expected. But the dependent trigger does not clear when the triggers it depends upon are cleared (not even if all of them are cleared).
In the frontend it says the last modification a few days ago. I acknowledge the problem, the dependent trigger disappears for a few minutes the reappears with a new unacknowledge event that I can not find and with timestamp of last fire (a few days ago).
Also, an action configured to be executed for this trigger is not executed.

I do not understand what happens: is it a frontend problem or a server problem ? Am i configuring something wrong ?
Thank you.