Mac Finder does not show skp file thumbnail (v 2017pro)

My system is High Sierra 10.13, SketchUp 2017 pro. It’s an old laptop and I had a few CPU-consuming extensions installed in SketchUp. Every time I open a skp file, it takes 1 minute waiting for the colorful dot to stop spinning. So thumbnail preview will be a real time saver.

But, it only shows the thumbnail preview for 8-10 times in general. And then it stopped. so I have to go through every single one to find the one I need. Is it a bug? or if not, is there a way to sort it out?

Thank you!