There is a great performance drop when switching between Content Panel Layouts, if Vertical is selected, its really really slow to scroll or navigate through the files. If the layout its switched to horizontal, then the performance is back to normal (really snappy). This is also dependent of number of files. if they are around 100, no issue , bot layouts work fine. currently Im in a folder with around 20k photos. This bug was not present in version 12.x