Assertion when starting an IPv4-only bridge on 0.4.5.2-alpha

When I set up a bridge on FreeBSD, I got this issue.

Jan 01 21:10:44.000 [notice] Bootstrapped 0% (starting): Starting
Jan 01 21:10:44.000 [notice] Starting with guard context "default"
Jan 01 21:10:44.000 [notice] Registered server transport 'obfs4' at '[::]:80'
Jan 01 21:10:45.000 [warn] tor_bug_occurred_: Bug: src/feature/relay/relay_find_addr.c:201: relay_addr_learn_from_dirauth: Non-fatal assertion !(!node) failed. (on Tor 0.4.5.2-alpha )
Jan 01 21:10:
Jan 01 21:10:45.000 [warn] Bug:     0x11a2ad2 <router_build_fresh_descriptor+0x2a2> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x11a1f3f <router_rebuild_descriptor+0x6f> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x11a1d49 <consider_publishable_server+0x39> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x1225714 <reschedule_descriptor_update_check+0x274> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x122a77a <periodic_event_connect+0x10a> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x8013fe0ed <event_base_assert_ok_nolock_+0xa5d> at /usr/local/lib/libevent-2.1.so.7 (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x8013fa09c <event_base_loop+0x53c> at /usr/local/lib/libevent-2.1.so.7 (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x116c861 <do_main_loop+0xf1> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x1155cbc <tor_run_main+0x12c> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x1154651 <tor_main+0x61> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )
Jan 01 21:10:45.000 [warn] Bug:     0x1154309 <main+0x19> at /usr/local/bin/tor (on Tor 0.4.5.2-alpha )

This happened on FreeBSD 12.2 on a bridge on Microsoft Azure. Tor was installed via pkg and I do not have a local-link IPv6 address.