I was the same. I'd not call if they had their hands on the timer but I had a couple of competitors pausing so now I just call it. I figure people should be expecting it.I have a related question. Sometimes when judging, the competitor has their hands already on the timer at 8 seconds. When I was new to judging, I felt that if I call 8 seconds just as they start to solve, I might distract them, so I would not call it. However, occasionally the competitor pauses with their hands on the the timer for 2-3 seconds. If I did not call 8 seconds, what should I do?
I once asked a delegate and he said if I miss 8 and they pause, call 9 or 10, but that might be even more distracting. These days, I just always call 8 seconds regardless, but I'm curious what other people think.
There was a video of dodgy judging recently where a judge kept calling time after the solve had started.