I'm finding that V12.10 dashboard hangs when trying to display a trellis bar chart when displaying a large amount of items.
The dashboard just hangs when you clear it, which throws more rows then the bar chart can handle.
My solution was to put a calculation condition on the chart that prevents it from displaying large quantity of items.
I used: Count(distinct [Item]) <= 15
There is really no indication that the dashboard hangs due to this condition so it was a process of elimination to track this down.