I actually did not really created a test user John Doe, but used an existing test user, who's last name was only one letter.

please check my edited post above. Not the whole last name is being removed. It's the last LETTER only. Tested with different users, different name lengths

exten => s,n,ExecIf($[${LEN(${THISDEVICE})}!=0]?AddQueueMember(${ARG1},Local/${CALLBACKNUM}@from-queue/n,${DB(QPENALTY/${ARG1}/agents/${CALLBACKNUM})},,${DB
(AMPUSER/${CALLBACKNUM}/cidname)},${THISDEVICE}))

exten => s,n,ExecIf($[${LEN(${THISDEVICE})}=0]?AddQueueMember(${ARG1},Local/${CALLBACKNUM}@from-queue/n,${DB(QPENALTY/${ARG1}/agents/${CALLBACKNUM})}))

The last parameter is the state interface parameter, I understand that you cannot pass that parameter to the command if you do not know the device to monitor, but the member name is still present in astdb in whatever mode you are. You can change the 2nd line to include the member name (and exclude the device state) by changing it to this:

exten => s,n,ExecIf($[${LEN(${THISDEVICE})}=0]?AddQueueMember(${ARG1},Local/${CALLBACKNUM}@from-queue/n,${DB(QPENALTY/${ARG1}/agents/${CALLBACKNUM})},,${DB
(AMPUSER/${CALLBACKNUM}/cidname)}))

However, I do not know if the member name was omitted by design or by mistake.

I'm using User & Device mode, if that is of any help...

thanks for your help!

As far as I know, since FreePBX 2.8 the macros for adding members include the member name option to Local/xxxx channels, for some reason your version is not doing that. Is that a stock freepbx? An update over older versions? Are you sure you did not modify those macros to remove the membername option being passed to addqueuemember?

Asterisk 1.6 and FreePBX 2.8.1.4 on Centos (AsteriskNOW)
FOP2.21 beta (language set to German), fop2admin 1.2.6
Test user: 1234 <John Doe>
Test queue: 4567 Test

if 1234 <John Doe> logs into one of our queues via FreePBX feature code 4567*
CLI> queue show
4567 has 1 calls...
Members:
Local/1234@from-queue/n (dynamic) (In use) has taken no calls yet

if 1234 <John Doe> is being added to a queue via cli "queue add member Local/1234@from-queue/n to 4567"
CLI> queue show
4567 has 1 calls...
Members:
Local/1234@from-queue/n (dynamic) (In use) has taken no calls yet

if I go to FOP2 (not fop2admin!!!) and click on the user button status icon and select "add to Test" to put 1234 <John Doe> into the "Test" queue
--> at this point John Doe's FOP2 Button changes to "John Do" immediately, also he is being added as "John Do" to the Test queue
CLI> queue show
4567 has 1 calls...
Members:
John Do (Local/1234@from-queue/n) (dynamic) (In use) has taken no calls yet

edit: issue was a little different

We have Device & User mode and the users are named "First_Name(Space)Last_name"

When re-adding the agent via FOP2.21 beta to his queues, the last letter is removed from his name, when I hit "queue show" in CLI the again. As a result on the next FOP2 login, the labels are again wrong.

why does FOP2 put the name into the queue member list anyway?

when users log into queues via feature code or when I add them via cli they are added without name and all FOP2 labels remain fine.

edit: slightly different issue

FOP2 renames labels to queuemember names if you have Local type queue members. Do a "queue show" in the asterisk cli and see if you have Local type queue members that have the same extension / context as your buttons that are being renamed..