Occasional chain slipping/skipping - is it possible for the hub to be at fault? So I have this problem for a while now, at first I thought its badly indexed gears, worn chain, worn pulleys, bent hanger etc, etc. But after changing majority of stuff still have this slipping stuff.
It feels like chain jumps/slips every once in a while and I get like 1/4th circle of free spin on cranks.
So my question is, is it technically possible that the hub is at fault?
Since:

Gears indexed well
Shifts very well
New chain
New pulleys
Derailleur good condition
Rear cassette good condition (still pretty newish)
Chainring good condition
Hanger not bent
Frame not bent

Had this problem with old chain too by the way.
Sram 1x11, sram nx x-sync chainring, kmc x11 chain, shimano deore xt derailleur, sram pg1130 cassete (11speed), shimano FH-RM35 hub (still stock, but bicycle was 11 gears stock too)
Yes, the hub can be at fault. The freewheel mechanism pawls may be sticking in the retracted position, or the pawls and teeth are worn and the pawls are slipping out of the teeth.
You can try to confirm this by having a friend ride behind and to the right of you and watch the cassette area (in an area free of obstructions where you can do this safely). They should be able to see if the cassette spins when the slip happens. If it does the hub is at fault.