When trying to pm or poke clients via server query, commands are executed successfully (error id=0 msg=ok), but clients do not receive messages or pokes.

login serveradmin ********
error id=0 msg=ok
use 1
error id=0 msg=ok
sendtextmessage targetmode=1 target=7 msg=Test
notifytextmessage targetmode=1 msg=Test target=7 invokerid=21 invokername=serveradmin invokeruid=serveradmin
error id=0 msg=ok
clientpoke clid=7 msg=Test
error id=0 msg=ok
clientinfo clid=7
cid=63 client_idle_time=5113785 client_unique_identifier=KF90[...] client_nickname=Marv [...]
I've double checked, and the client id is definitely correct:

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I've checked with an alternate identity and the behaviour stayed the same.

Global messages work just fine.

Any ideas? Thanks in advance!