Exact model number?
There could be several different things going on. I agree minimum load is likely one issue. There’s a lot of discussion on that in the following thread which might be helpful. Many switches that don’t use neutrals need at least a 40 W minimum load or dimming doesn’t work properly.
The log entries concern me, though. There shouldn’t be any log entries if the issue is just flickering because of insufficient load. That’s just a mechanical thing that happens at the fixture, SmartThings wouldn’t even normally know was happening. Are the log entries for set level? Or something else? I ask about the set level because there have been some bugs and that lately including random commands being sent.
It’s also possible there’s runway polling somewhere but we’ll know more from the log entries.
So could even be that there’s more than one problem going on
As far as having messages moved, don’t be concerned about that. It happens all the time. 
Just keeps the threads clean. It’s really common that a question gets asked and the people who know the answer know that it will be off topic for that particular thread. The person asking the question doesn’t know because they don’t know the answer. I had several Harmony posts moved out of one thread yesterday because I thought The problem was related to the firmware update and it turned out to be something entirely different. No big deal, the moderator started a new thread for my comments and in fact the person who knew the answer read the post, asked a couple questions, and fixed the problem today.