Issues with lightroom

I have lightroom  12.1 and in past few weeks my work has been extremely hard due to new issues which appeared after an update. 

Issue 1 - When i import photos from camera, in the library the icons are greyed out, and if i have few photoshoots in the same day i must have a guess where the photos are so i cant see them, however latley there has been another issue which appeared, as photos seem to be mixing up and are not in the right order as i want to import them, and without seeing icons this is making my day2day wotk like extremely hard. 

Another issue is when i finaly select photos which are getting imported now it takes 5 times longer for them to be transformed ( usually would take 20 minutes for a big-ish lbum to be ready now approximately 2-3 hours (sometimes longer ) also when i want to  export one photo , ( which i use as a preview for a client or just to post on socila media now Lightroom is not exporting them, i have to select few photos as one wont be downloaded. 

Can you please urgently advise how can this be resolved. 

All my apps are up to date/ my computer as well. 

Thanks