Log from today. I think the first are not related but we were only changing some route-map rules and the only difference with other routers i can find is that there was a typo in the prefix in a prefix-list which resulted in the warning on the first line of log.
Apr 24 09:09:34 router1 bgpd[1210]: Prefix-list AS65001-own-prefixes-v4 prefix changed from 10.1.11.1/24 to 10.1.11.0/24 to match length
Apr 24 09:22:04 router1 bgpd[1210]: bgp_update_receive: rcvd End-of-RIB for IPv4 Unicast from 10.1.11.1 in vrf default
Apr 24 09:41:06 router1 bgpd[1210]: bgp_update_receive: rcvd End-of-RIB for IPv4 Unicast from 10.1.11.1 in vrf default
Apr 24 10:21:40 router1 bgpd[1210]: Received signal 11 at 1587723700 (si_addr 0x8, PC 0x7fd15fe57316); aborting...
Apr 24 10:21:40 router1 bgpd[1210]: Backtrace for 18 stack frames:
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(zlog_backtrace_sigsafe+0x67) [0x7fd15fe3a3c7]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(zlog_signal+0x113) [0x7fd15fe3a823]15fe3a3c7]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(+0x73b85) [0x7fd15fe5bb85]5fe3a823]15fe3a3c7]
Apr 24 10:21:40 router1 bgpd[1210]: /lib/x86_64-linux-gnu/libpthread.so.0(+0xf890) [0x7fd15ec62890]bb85]5fe3a823]15fe3a3c7]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(route_map_upd8_dependency+0x1c6) [0x7fd15fe57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(route_map_add_match+0x1d7) [0x7fd15fe57aa7]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(generic_match_add+0x1d) [0x7fd15fe57b8d]a7]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(+0x3182f) [0x7fd15fe1982f]x7fd15fe57b8d]a7]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(cmd_execute_command+0xe7) [0x7fd15fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(cmd_execute+0xb7) [0x7fd15fe1bc57]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(+0x86995) [0x7fd15fe6e995]fe1bc57]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(+0x86c26) [0x7fd15fe6ec26]fe1bc57]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(+0x894e6) [0x7fd15fe714e6]fe1bc57]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(thread_call+0x60) [0x7fd15fe69530]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/x86_64-linux-gnu/frr/libfrr.so.0(frr_run+0xd8) [0x7fd15fe38658]530]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/frr/bgpd(main+0x322) [0x555dfb569ca2]run+0xd8) [0x7fd15fe38658]530]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7fd15e8c9b45]530]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: /usr/lib/frr/bgpd(+0x3ad9c) [0x555dfb56bd9c]_main+0xf5) [0x7fd15e8c9b45]530]fe1bab7]]57316]
Apr 24 10:21:40 router1 bgpd[1210]: in thread vtysh_read scheduled from lib/vty.c:2645
Apr 24 10:21:40 router1 watchfrr[1174]: [EC 268435457] bgpd state -> down : read returned EOF
Apr 24 10:21:45 router1 watchfrr.sh[89343]: Cannot stop bgpd: pid 1210 not running
Apr 24 10:21:47 router1 watchfrr[1174]: bgpd state -> up : connect succeeded