Well Patchou, I think it's a limitation but I still want to point it out...
Some of you know that I have a plug-in called Hopper doing appearing offline and going online in a row
When I saw the new plug-in feature in 2.21.55, I thought a quicktext of
#/appearoffline
#/online
would just work as charm as my hopper...but it didn't.
Why? I think it's because that when I was appearing offline, I couldn't send any more texts/commands...so /online was completely ignored then.
Same applies to
#/block
#/unblock
of course.
Have a consideration about this