Node-red-node-email hangs in latest version

I'm now running version 1.15.1 and the problem is still there.

I have a debug node linked to the output of node-red-node-email (that checks on incoming mail), the debug node had a correct output yesterday evening. But this morning, when a new mail arrived, the node hangs with no output at all.

I'm referring to the closed topics, all details and screenshots are still relevant: