Unsure how I triggered it at this moment, but for some reason I got an 1/4 0/5 skill. (only when you hoover over the skill it’s 1/4).
The only note worthy atm is that it happened during a monolith.
Will try restarting the game later and see what happens.
(3* high qual settings,no AA, v-sync on 2560*1440 FS, med brightniss)
edit: adding an other point still keeps it at 0/5, but hoovering over it makes it 2/4 (also added name of the skill in toptic)