So, couple of bugs i think:

Farmlands - there are two roads that are near storm weapon just north of Farmlands waypoint, one of the road looks to be open but there is invisible wall. Can't leap over it as well, 2nd road is fine and leads to Sviir Cave Network quest.
[Edit] - OK, so after Den quest and boss fight now i can go via this blocked road - i think there should be some barrier or guard that tells you that you can't go there, tho i was able to leap to this area at some other part of map and continue to waypooint at shore before finishing cave quest line

Svriir Cave Network - I was running quest line until "Find entrance to the Svriir Cave Network 2". When I've passed Cave Network 1 and end up in Camp (Tributes Chamber), quest did not update after I've entered level 2 - i was able to pass cave lvl 2 until end to as i think boss location but nothing happened.
[WORKAROUND] - exit game, start game as public, quest will be set to Find Cave, quit game, start as private, follow quest, worked for me.

Zanafer Stark - when you put weapon in to his "gem remove device" weapon is taken from You character inventory - wen you just move away from him he will drop item on ground - this is odd behavior. Should weapon/item only be "selected" as for remove gem from it, not moved from slot?