winbind panic, INTERNAL ERROR: Signal 11

On multiple systems the winbindd service stops working after some hours of being started.
A restart of the service gets it back but only for it to fail again hours later.
I've tried disabling/enabling Trusted Domain, Directory caching etc... no change, still crashes hours later.

root@nex04[~]# cat /var/log/samba4/log.winbindd
[2020/10/30 02:04:37.682085,  0] ../../source3/winbindd/winbindd.c:1779(main)
  winbindd version 4.12.7 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2020
[2020/10/30 02:04:37.711874,  0] ../../source3/winbindd/winbindd_cache.c:3205(initialize_winbindd_cache)
  initialize_winbindd_cache: clearing cache and re-creating with version number 2
[2020/10/30 02:04:37.759125,  0] ../../lib/util/become_daemon.c:136(daemon_ready)
  daemon_ready: daemon 'winbindd' finished starting up and ready to serve connections
[2020/10/30 05:00:30.847646,  0] ../../lib/util/fault.c:79(fault_report)
  ===============================================================
[2020/10/30 05:00:30.847682,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 3071 (4.12.7)
  If you are running a recent Samba version, and if you think this problem is not yet fixed in the latest versions, please consider reporting this bug, see https://wiki.samba.org/index.php/Bug_Reporting
[2020/10/30 05:00:30.847764,  0] ../../lib/util/fault.c:86(fault_report)
  ===============================================================
[2020/10/30 05:00:30.847770,  0] ../../source3/lib/util.c:830(smb_panic_s3)
  PANIC (pid 3071): internal error
[2020/10/30 05:00:30.849195,  0] ../../lib/util/fault.c:265(log_stack_trace)
  BACKTRACE: 6 stack frames:
   #0 0x802f39907 <log_stack_trace+0x37> at /usr/local/lib/samba4/libsamba-util.so.0
   #1 0x807578226 <smb_panic_s3+0x56> at /usr/local/lib/samba4/libsmbconf.so.0
   #2 0x802f396f7 <smb_panic+0x17> at /usr/local/lib/samba4/libsamba-util.so.0
   #3 0x802f39ade <log_stack_trace+0x20e> at /usr/local/lib/samba4/libsamba-util.so.0
   #4 0x802f396d9 <fault_setup+0x59> at /usr/local/lib/samba4/libsamba-util.so.0
   #5 0x80f273c20 <_pthread_sigmask+0x530> at /lib/libthr.so.3
[2020/10/30 05:00:30.849246,  0] ../../source3/lib/dumpcore.c:315(dump_core)
  dumping core in /var/db/system/cores
root@nex04[~]#
root@nex04[~]# service winbindd status
winbindd is not running.