I Have run into issues with preview on Mojave that killed my productivity. It would no longer let me pull any and all files into one group, it would no longer allow deletions from any group made and then opened.
I did extensive research on new machines and other updated I macs to find no difference. When speaking to Apple the toss it up to a rogue program or old software conflicts.
I ended up deleting the Mojave loaded app & installed the Older version back into mojave. It works perfectly, But I can’t update any past first Mojave run.
Does anyone else have a similar situation?