I updated to 2.1.7.118 recently and noticed that a few Rule Machine 4.0 rules with HTTP POST actions don't seem to be running correctly. The changelog for 2.1.7 mentions HTTP POST fixes, but maybe the fix needs fixing? I reverted back to 2.1.6.118 and the command below works again.
Thanks for your post. I thought I'd messed up the syntax of one of my rules which stopped working yesterday (no values are passed), but it appears to be a change of behaviour in 2.1.7.118.