Hi, on bird 3.3.2-cznic.1~trixie after adding: merge paths on limit 3; to the IPv6 protocol settings and reconfiguring I noticed this BUG line in the log running 'configure' a second time did not reproduce the same BUG log entry: <INFO> Reconfigured <TRACE> device1: Scanning interfaces <TRACE> kernel2: Scanning routing table <TRACE> kernel2.ipv6: Export state changed from DOWN to FEEDING <TRACE> kernel2.ipv6: Export state changed from FEEDING to PARTIAL <TRACE> kernel2.ipv6: route refresh begin: rr 13057 set 1 valid 0 pruning 0 pruned 0 <TRACE> kernel2: Pruning table master6 <TRACE> kernel2.ipv6: route refresh end: rr 13057 set 1 valid 1 pruning 0 pruned 0 <TRACE> kernel2.ipv6: table prune after refresh begin: rr 13057 set 1 valid 1 pruning 1 pruned 0 <TRACE> kernel2.ipv6: table prune after refresh end: rr 13056 set 1 valid 1 pruning 1 pruned 1 <WARN> I/O loop cycle took 6999.418 ms for 10 events <BUG> Assertion '!new || rte_is_valid(new)' failed at nest/rt-table.c:1562 best regards, Christoph