Goovy Cast Exception on Lights Rule with Group lights (Migrated to c8)

Upgraded from C5 to C8. Now I am getting this error.

A pre-exisiting rule as well as a newly created rule give me a Goovy Cast Exception "org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'null' with class 'null' to class 'double'. Try 'java.lang.Double' instead on line 9052 (method appButtonHandler)"

Devices -All Zigbee devices. Group managed Sengled led lights and Smart things motion sensor.

The Button Handler reference at the end of the error may mean this is something different, but I wonder if it is related to the topic below...? Like Bruce requested on there, I would also post a screenshot of your rule and turn on logging in the rule to try and work out where exactly the error may be being generated. Also double-check the devices used in your rule are referencing are still functioning as expected, particularly when controlled from the HE hub.

Ah yes it was the delay per mode! Just read the .105 known issues after updating.

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