I had a problem with my server : it crashed 5 minutes after I connected. It was due to announcement delay 0 (division by 0). Maybe it could help
(https://github.com/ddnet/ddnet/issues/4206)(edited)
In configuration file, when sv_announcement_interval is 0 (min=1; max=9999), server crashes after 1 minute with signal 8 (floating-point exeption) due to a div by 0. Backtrace: #0 0x000055555558026...