Node-Red Bigtimer stopped working at end of January 2024

I have two Node-Red automations which depend on the Bigtimer node. They worked as expected up until January 31, 2024 but haven’t fired since then. No changes were made to the relevant node-red flows since then either.

I updated to HA Home Assistant core 2024.1.3 on Jan 31 so I have a theory that this update broke the code behind the node. Has anybody else had Bigtimer working funny since then?

I could switch to an alternative to Bigtimer if there are recommendations.