I sent you 21 sats and everything was fine. 

However, if you want to send sats reliably it's always a good idea to have a self-custody wallet like Muun.

Btw. do you have at least 500-1000 sats on your WOS? 

Maybe it's a channel problem.

 

 It’s working now, thanks.
And yeah I always like to keep it around a couple of million so yeah I’ve got plenty of sats 💜