Comment 2 for bug 1621396

StacktraceTop:
 dns_packet_is_reply_for (key=0x558fe28027b0, p=0x558fe27fdb50) at ../src/resolve/resolved-dns-packet.c:2267
 dns_transaction_process_reply (t=0x558fe28027e0, p=0x558fe27fdb50) at ../src/resolve/resolved-dns-transaction.c:1010
 on_dns_packet.lto_priv.85 (s=<optimized out>, fd=<optimized out>, revents=<optimized out>, userdata=0x558fe28027e0) at ../src/resolve/resolved-dns-transaction.c:1107
 source_dispatch.lto_priv.92 (s=0x558fe27f2ea0) at ../src/libsystemd/sd-event/sd-event.c:2267
 sd_event_dispatch (e=e@entry=0x558fe2790280) at ../src/libsystemd/sd-event/sd-event.c:2626