The manufacturer hadn’t enabled the optical noise filter . Elena found the setting, turned it on, and the false trips stopped.
The standard specifies how ESPE systems must perform to detect persons and interface safely with machinery. IEC 61496-1:2020 iec 61496-1 pdf
Specifically targets devices designed to detect persons or parts of persons. The manufacturer hadn’t enabled the optical noise filter
: Test procedures were expanded into more detailed, step-by-step instructions to reduce ambiguity. Where to Find the Official PDF turned it on
If you need the document, you can purchase it from the IEC Webstore or access it through national standards bodies (ANSI, BSI, DIN, etc.). Some university or corporate libraries also provide access.