Started playing this month after years of being away. I remember this issue from Pre-Heavensward.

ISP: Spectrum
Location: I'm in Texas.
Connection Issue: Disconnections especially when entering a dungeon. I've tried suggested steps.
Frequency: Everytime I've entered a dungeon, within seconds, I have dc'd. Switching zones: sometimes I DC. And other random times, but if I'm not switching places, usually fine until random moment where I'm not.
Error Codes seen: 90006
Tracing route to 184.107.107.176 over a maximum of 30 hops

1 4 ms 3 ms 3 ms 192.168.0.1
2 21 ms 18 ms 19 ms 142.254.141.45
3 46 ms 36 ms 51 ms xe0012.dllxtx5302h.texas.rr.com [70.125.219.21]
4 23 ms 28 ms 29 ms agg26.grpvtx1102r.texas.rr.com [24.175.50.73]
5 24 ms 26 ms 21 ms agg26.dllbtxlb02r.texas.rr.com [24.175.36.216]
6 26 ms 29 ms 38 ms agg21.hstqtxl301r.texas.rr.com [24.175.49.8]
7 42 ms 28 ms 29 ms ge-2-1-0.a0.sea90.tbone.rr.com [66.109.1.218]
8 30 ms 29 ms 28 ms bu-ether12.dllstx976iw-bcr00.tbone.rr.com [66.109.6.39]
9 24 ms 27 ms 18 ms 0.ae2.pr1.dfw10.tbone.rr.com [107.14.17.236]
10 30 ms 29 ms 22 ms ix-ae-23-0.tcore2.DT8-Dallas.as6453.net [66.110.57.97]
11 72 ms 95 ms 58 ms if-ae-2-2.tcore1.DT8-Dallas.as6453.net [66.110.56.5]
12 65 ms 59 ms 59 ms if-ae-23-2.tcore2.CT8-Chicago.as6453.net [64.86.79.120]
13 64 ms 63 ms 64 ms if-ae-3-2.tcore1.W6C-Montreal.as6453.net [66.198.96.45]
14 61 ms 66 ms 68 ms 66.198.96.58
15 63 ms 62 ms 58 ms te7-3.dr9.mtl.iweb.com [67.205.127.214]
16 63 ms 68 ms 69 ms 174.142.115.218