6m [nwc] info waiting for response ...
6m [nwc] info published pay_invoice request
6m [nwc] ok connected to wss://relay.coinos.io
6m [nwc] info sending payment: payment_hash=7c08bcc4401ffb2236120b0b7be8370ddc920bdb2d30813ef89f767d42274d8e
8m [nwc] info waiting for response ...
8m [nwc] info published pay_invoice request
8m [nwc] ok connected to wss://relay.coinos.io
8m [nwc] info sending payment: payment_hash=9270bdd1a6873506f5b1bf375c45642e1d6a10116d803abdead041b3a7a164b1
10m [nwc] info waiting for response ...
10m [nwc] info published pay_invoice request
Not at that moment, it seemed to be intermittent server issues with coinos.io. Their web interface was also hanging at the same time. After a couple of minutes it worked again.