service doveadm - how to debug proxying with director

[patosec]

Hello everyone,

I'm on a small dovecot director -> dovecot mailbox setup and I try to 
get doveadm command proxying to work.
Though I don't get the expected output. My directors do not forward the 
doveadm commands to the expected backend host.
Doveadm is working as expected on the backend hosts, the director hosts 
just dont log anything about the proxying that should happen or anything 
else about the doveadm commands at all.

Can someone guide me in a direction on what to try next or maybe got a 
working config regarding doveadm proxying?
Thanks in advance!

Some technical data regarding my problem:

Dovecot Version: 2.3.10 (0da0eff44)

Output of a 'doveadm director status' command:
mail server ip tag    vhosts state state changed users
10.0.0.81  tag1 100    up    -             0
10.0.0.82  tag1 100    up    -             1

Output of a 'doveadm director ring status' command:
director ip   port type  last failed status      ping ms input output 
buffered buffered peak last read           last write
10.0.0.193 9090 self  never       ring synced 5       -     - -        
-             -                   -
10.0.0.194 9090 right never       synced      0       2051  6400 
0        757           2020-05-28 09:56:37 2020-05-28 09:56:37
10.0.0.195 9090 left  never       synced      0       4929  1804 
0        37            2020-05-28 09:56:37 2020-05-28 09:56:37


This is my dovecot-director hosts configuration (doveadm related part):
service doveadm {
   inet_listener {
     # any port you want to use for this:
     port = 24245
   }
}

local 0.0.0.0 {
   # password to use for client authentication
   doveadm_password = secret
   # allow client to only use specified list of commands (default is all):
   #doveadm_allowed_commands =
}

# same port as doveadm's inet_listener
doveadm_port = 24245

protocol doveadm {
   # NOTE: director-userdb socket is actually used only for passdb 
lookups, not userdb lookups
   auth_socket_path = director-userdb
}


And here the dovecot-backend hosts configuration (doveadm related part):
### director conf
service doveadm {
   inet_listener {
     # any port you want to use for this:
     port = 24245
   }
}

local 0.0.0.0 {
   # password to use for client authentication
   doveadm_password = secret
   # allow client to only use specified list of commands (default is all):
   #doveadm_allowed_commands =
}


A 'doveadm user -u test at test.com' command on the backend host:
userdb: test at test.com
   user      : test at test.com
   home      : /var/spool/imap/test at test.com
   quota     : maildir:User quota
   quota_rule: *:storage=1048576:messages=153000

A 'doveadm user -u test at test.com' command on the director host:
userdb: test at test.com
   user      : test at test.com