Lights flickering - bulbs or Inovelli switch at fault?

One of my rooms just started to flicker. It's 6 canless recessed LED dimmables routed to an Inovelli scene capable dimmer (but I don't remember the model). It's been functioning great for many years and only now starting to flicker occasionally. The flicker seems unrelated to brightness, but for the record we use the light at 100% most of the time (so this isn't "flicker near the lower end" stuff).

Any obvious debugging steps I can take without taking the switch out? I don't know my exact Inovelli model and I wonder if I can figure that out from the Z-wave info via Hubitat?

I'm hoping for neat ideas to debug the situation before I go swapping hardware one by one to identify something that's problematic.

The model should be identified on its Device page. It seems like Inovelli has been updating a bunch of their drivers lately, so it may be related to a (new) driver/device setting. I'd start there.

Otherwise, a sudden case of flickering could indicate a wire that's somehow come loose. So that's the next thing I'd look for.

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The devices page just says Inovelli Z-Wave Smart Scene Dimmer which is nonspecific, right?

From browsing this page I just found, I think I have a Red-Series Z-Wave NZW31-S-Dimmer-Switch