Creative Mode - Saved Toolbar WON'T save

I updated MC, 1.12 - PC

I've come across a issue where I "saved" several "custom" items, enchanted items with high enchantments for fun and testing it shouldn't be a issue.

However, I spammed up the Save toolbar to Slot 8 and it failed to delete/save/spawn items. I tried deleting the file I forget what it was called, essentially the hotbar save file- it saves the data. The hotbar save file is empty and new, however the C+1 still won't save. I'm puzzeled I've dug through all the reports and files- Nothing.

I'm reaching out for assistance as I'm at a loss I'm going to go through and delete certain files and clean up my folder however I'm very sure it's a bug. It was working when I updated- I haven't added any mods.

• Thanks