reports time worked

reports time worked

Hello.
We want to try this product. But there is a question. I have 4 specialists who work from 9 to 18. Every day from 18 to 9 and on weekends, one of them is on duty.
While on duty, he receives requests manually and resolves them. But the time spent report shows 0. What tool can fix this?
I tried the "In progress" status, but it still doesn't work.
I saw that this can only be done using a timer, but my specialists may forget about it, I would like a more automated tool.

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