Problem is still here in the latest release. Also, now Browse mode is skipping large blocks of profiles going up and down. I created a separate thread and ticket for that. Haven't spent a lot of time in performance mode, since I was just messing with Liquid profiles, but hopefully the new OS hasn't introduced more performance mode issues as well.
This Browser Mode issue turned out to be a misunderstanding in your other thread.
The Up/Down Buttons of the Rig Navigation Cross initiate bigger jumps depending on the selected sorting criteria. If for example "By Author" is selected, Up jump to the next author skipping all other Rigs of the current Rig's author.
And Up and Down Buttons of the Remote jump complete banks. So Up jump five Rigs forward.
This is usual and intended functionality since day 1.