Lag problems and diferently latency in same areas (not new instances)

GGG to explain problem, some NEW areas randomly like connect to some diferent internet path and have real big latency, so how i found to solve this problem, i reenter same area and every time i re enter same area (not new instance) i got diferent latency, so in most ways it is steady and varies from 40-50 ms, so from time to time when i enter new area or re enter old it become so lagy it is unplayeble, and creates way big lags it is changing from 200+ to some random numbers up to a 60k + so can somebody explain why is game doing this and why same area (not new instance) when entered few times have diferently latency ? how to fix this problem other then reentering area to have stead latency, for futher problem solving i could make a video proof.

problem is with maps and portals because i need to waste somethimes 4-5 portals to reenter and have normal latency, idk how to solve this, can somebody explain please and tnx.