Can reproduce. This wasn't the intention. We're probably inheriting the behavior from PlasmaCore.ToolTipArea which automatically respects that global setting because it's a tooltip. But we don't want it to for this context here because these thumbnails are not *functionally* tooltips, even if they're *implemented* as tooltips.

There is some confusion here, from myself as well. I recently learned that the option in question is not in fact a global option, and only affects Plasma panel tooltips. It's definitely not clear.

The current plan is to delete the option entirely, but we might end up being convinced to instead simply move it into the Panel settings window to make it clear that it's a Panel-specific setting. If we do that, it might be possible to add a setting in the Task Manager to not respect that setting, since it seems that the people who don't want Panel tooltips do want Task manager preview tooltips.