circuit_build_times_update_alpha(): Bug: Could not determine largest build time

I don't think this is HSv3 ONLY related, but I can only make it happen while building large amounts of rendezvous circuits with reasonable concurrency (over 50). I am not assigning the tor-hs keyword for this reason, but sticking it to same master parent ticket.

All lines are the same. It is seen for like 130-160 times during the build of little over 100.000 rendezvous circuits.

Apr 03 04:05:33.000 [warn] circuit_build_times_update_alpha(): Bug: Could not determine largest build time (0). Xm is 20025ms and we've abandoned 0 out of 136 circuits. (on Tor 0.4.4.0-alpha-dev )
Apr 03 04:05:33.000 [warn] circuit_build_times_update_alpha(): Bug: Could not determine largest build time (0). Xm is 20025ms and we've abandoned 0 out of 137 circuits. (on Tor 0.4.4.0-alpha-dev )
Apr 03 04:05:33.000 [warn] circuit_build_times_update_alpha(): Bug: Could not determine largest build time (0). Xm is 20025ms and we've abandoned 0 out of 138 circuits. (on Tor 0.4.4.0-alpha-dev )
Apr 03 04:05:33.000 [warn] circuit_build_times_update_alpha(): Bug: Could not determine largest build time (0). Xm is 20025ms and we've abandoned 0 out of 139 circuits. (on Tor 0.4.4.0-alpha-dev )
Apr 03 04:05:33.000 [warn] circuit_build_times_update_alpha(): Bug: Could not determine largest build time (0). Xm is 20025ms and we've abandoned 0 out of 140 circuits. (on Tor 0.4.4.0-alpha-dev )

EDIT: All lines are the same except it always abandons 0 out of N circuits and N is always different of course, increasing with +1 most of the times until the Bug warn disappears.