No route for at peers for 50.246.32.0/19, broken BGP within AS7922

Trying to reach 50.246.56.166 in Houston, TX.

traceroute to 50.246.56.166 (50.246.56.166), 30 hops max, 40 byte packets
1 ge1-0-1.edge01.lin.inebraska.net (199.184.119.66) 1.186 ms 1.026 ms 1.142 ms
2 h113.52.170.216.static.ip.windstream.net (216.170.52.113) 25.928 ms 1.072 ms 1.568 ms
3 h24.199.82.166.dynamic.ip.windstream.net (166.82.199.24) 5.139 ms 1.086 ms 1.000 ms
4 h182.229.190.173.static.ip.windstream.net (173.190.229.182) 18.118 ms 20.055 ms 19.112 ms
5 xe-1-0-2.ar3.dal1.gblx.net (64.209.110.213) 25.861 ms 25.431 ms 25.757 ms
6 ae6-90G.ar5.ATL1.gblx.net (67.16.156.138) 35.321 ms 35.384 ms 36.121 ms
7 146.82.35.122 (146.82.35.122) 40.009 ms 64.209.97.14 (64.209.97.14) 36.152 ms 64.209.107.54 (64.209.107.54) 37.483 ms
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *

From another local Comcast business circuit in metro Houston (not in 50.246.32.0/19)

traceroute to 50.246.56.166 (50.246.56.166), 30 hops max, 60 byte packets
1 vl20.tm01-1.hstntx.blnt.ad (10.31.20.5) 1.638 ms 1.609 ms 2.515 ms
2 75-148-218-142-houston.hfc.comcastbusiness.net (75.148.218.142) 3.446 ms 4.834 ms 6.991 ms
3 * * *
4 68.85.250.209 (68.85.250.209) 13.460 ms 19.514 ms 20.663 ms
5 * * *
6 * * *
7 * * *

Packets from AS7018 NYC do make it across to AS7922 but die in Atlanta.  Packets peering with GBLX in Dallas do not make it onto AS7922 at all.