@Aartrace1 I made some changes to my SU file, saved them. Went to Layout, updated model reference. No camera positions had changed, all viewports and layers were locked. The yellow triangle was on every layer.
I got it to turn off by unlocking each layer and viewport and updating the model reference then locking it all up again. But after I'd done that to each layer I went to turn them all on again, and the triangle was back on all of them. đ”