I am starting to have big losses but the insights are inaccurate and i can't be sure which actor fails. On debugging section there is not a run that justifies that.

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Hey, have you checked the monitoring tab for your Actor in the Apify Console? Unfortunately, the users' runs can't be shared with the developers. I suggest you implement some monitoring on your side.

I found the cause of the issue (thanks to support). My actor remained idle for over an hour for no apparent reason. Although decreasing the timeout period can mitigate losses, losses still occur. I have now implemented a rule in my code for the actor to exit if it remains idle for more than five minutes.