Tiff Thumbnails have strange grid pattern and come out grey when saved

Hello,

This has been happening for years to Tiff Files and realized it has something to do with Alpha Channels. When I delete all the alpha channels the thumbnail is normal. When there are any alpha channels it gives you this strange thumbnail. It's more annoying than anything since it isn't giving you the information you need to be able to pick the file and if most of the files are affected this way it starts to become cumbersome to find what you are looking for. If anything just distracting.

So this might not be a question since I have the solution, but I don't know why I can't have alpha channels in these files. If they are PSDs files they come out fine or cut off sometimes when you open up a preview since alpha channels are masks. I don't know if this is a Photoshop issue or a Mac issue. I think I may have experienced this on other macOS systems prior to Monterey. I don't think this has anything to do with upgrading or anything though maybe a newer imac might solve this issue (newer than a 2015 imac).

I just wanted to see if anyone has had these issues before and maybe there is some kind of saving thing I'm not doing right. I typically don't compress TIFFs. I treat them like high quality final versions usually flattened. PSD files I save them with layers as Final.