Auto-disconnect when in range of certain things

I've been having this problem for a while.

It only happens occasionally, but it's SUPER frustrating when it happens.

When it happens, getting within range of something in the zone (I have no idea what) will cause an instant disconnect. If this thing happens to be within range of the entry portal (such as inside a Mirage), then you just DC as soon as you go through a portal.

My most recent instance of this happened with my Feared invite, upon re-entry.

What I mean by re-entry is this: I started the invite, it was going normally, and then I died. When I tried to re-enter the zone, I was instantly disconnected. I tried to go back in again, another instant disconnect. I wrote a "/bug" entry. I switched characters, and tried to enter on a different character. Instant disconnect.

It was bad enough when it would occasionally happen in the mirage of a juicy map, and I was losing the doubling effect of my scarabs... but losing the Feared after 5 boss witnesses, some of which have quite expensive entry tokens is extremely frustrating and discouraging. Especially since I've been reporting this bug for weeks, and have not received any acknowledgement that it even exists.

This is NOT some ddos related disconnect--when it happens in a map (far enough away from the portal), I can stay in the map as long as I want without disconnecting. Including killing mobs and using all my skills. I only DC when I enter the auto-DC area centered around something. I know it's a radius of a point because I can basically map it out by approaching from different sides.