Trouble controlling outdoor gas heater with 8ANS

I've controlled this type of load before without issue, but I've got a client with a couple of these on two separate 8ANS switches and they will work for a little while, then just turn off and it's unclear why. Sometimes they'll work for a while, and sometimes they wont. I'm just wondering if anybody has come across anything like this and found a solution.

My initial thought is that the maintained operating wattage of the heater igniter is borderline so maybe adding an additional load somewhere in the circuit or putting the whole thing on a contactor might help. Using a normal mechanical switch everything works fine... just not on a lutron system switch.

Thanks in advance for any help.

Duplicate thread located here:

https://forums.lutron.com/showthread...ater-with-8ANS