Hey there…
At 1080p, there is a small section of the eternity cache UI window that overlaps and prevents selecting the items in the top left two blocks of the inventory… You cannot actually select anything in the first 2/3rds (give or take) of the initial column (red block below)… You have to mouse on the right edge of the first two blocks to be able to select anything in those blocks.
Obviously not a serious issue and unlikely to be noticed at higher resolutions, but thought I would post it…