Daily traceroute fails for one particular target

[leibold]

Any idea why this particular traceroute is being rejected by the  daily traceroute test ? I have done 96 of the 100 daily traceroutes by now and as long as the target of the traceroute was pingable from he.net the daily tests have generally been accepted just fine. However this destination (I also tried ipv6.pe without the www prefix) is being rejected with the error message that the line before the first hop needs to be included (it is).

Only the daily traceroute failed. I used the same site for the daily dig and daily ping tests successfully.

traceroute6 www.ipv6.pe
traceroute to www.ipv6.pe (2607:f0d0:1301:3d::243), 30 hops max, 40 byte packets using UDP
1  gw-leibold.ipv6.sonic.net (2001:5a8:0:1::d26)  12.880 ms   10.416 ms   11.227 ms
2  2001:5a8:0:2:: (2001:5a8:0:2::)  13.596 ms   13.281 ms   13.765 ms
3  tunnel4.fmt.ipv6.he.net (2001:470:1fff:2::16)  19.669 ms   18.317 ms   21.362 ms
4  2001:470:0:1f::1 (2001:470:0:1f::1)  21.099 ms   31.532 ms   27.465 ms
5  10gigabitethernet1-2.core1.sjc2.he.net (2001:470:0:2f::2)  24.369 ms   20.013 ms   20.372 ms
6  10gigabitethernet4-3.core1.sea1.he.net (2001:470:0:1c7::2)  39.393 ms   38.908 ms   42.749 ms
7  v6-te1-5.bbr01.wb01.sea01.networklayer.com (2001:504:16::8dff)  39.693 ms   40.612 ms   44.994 ms
8  po3.bbr02.cf01.den01.networklayer.com (2607:f0d0:2:2::11)  83.960 ms   83.617 ms   81.102 ms
9  po4.bbr02.eq01.dal01.networklayer.com (2607:f0d0:2:2::a)  72.479 ms   73.547 ms   71.169 ms
10  2607.f0d0.0002.0002.0000.0000.0000.0035-static.reverse.softlayer.com (2607:f0d0:2:2::35)  70.368 ms   74.139 ms   72.721 ms
11  2607:f0d0:1300:1::5 (2607:f0d0:1300:1::5)  71.169 ms   74.270 ms   71.501 ms
12  2607.f0d0.1301.003d.0000.0000.0000.0243-static.v6reverse.softlayer.com (2607:f0d0:1301:3d::243)  75.511 ms * *