It's seems to be confusing that the values specified in "{client,server} smb3 {signing,encryption} algorithms" use different values than the output of smbstatus shows.
This bug was referenced in samba master: 867c6ff9f3f28ab4bfa0cb1660889f3f5be0d111
Created attachment 16796 [details] Patch for 4.15 cherry-picked from master
Pushed to autobuild-v4-15-test.
This bug was referenced in samba v4-15-test: 33f06d10a03a3e51fe0774491f73a392471f4f81
Closing out bug report. Thanks!
This bug was referenced in samba v4-15-stable (Release samba-4.15.0rc7): 33f06d10a03a3e51fe0774491f73a392471f4f81