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Hum.... now I just deleted the expresso tag and it renders well, and the light is as interactive as before.

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Does this make any sence?
I am glad I found the problem, at least how to avoid it.
But would be interesting to know, what exactly causes the issue.
I also use a Camera rig with an expresso tag and had some random crashes, when changing values.

Greetings,
ChrisVis

yes, preset object creations has a problem i think. can you share crashed setup? so i can check.
thanks for efforts

Sent a PM to you,
thanks so far