Connection/latency issue when interacting w/ certain NPCs

Hello guys,
so far, i've found that interacting with 'lilly roth' when going from act 9 to 10 will give a connection error which spiked my latency up from 30ish to 100k+. some other npcs have similar issues but to a far less extent. from memory, interacting with 'hargan' in both towns gave me a lot of latency spiking up to about 4-7000ish.

the one NPC that i can definitely confirm and can replicate is with 'jun'. which when unveiling an item (after you have selected a mod to unveil), it spikes my latency upwards of 100k+. my solution to this was as soon as i unveil, i leave the selection window and would only spike up to around 300-500 ping and back down to a regular 30-40ping, resulting in playable gameplay instead of disconnecting me from the server due to unexpected connection errors.

hopefully this helps,

john