well that is not good. It should have printed perfectly… and again- the flaw is confined to the interior of the faceted cavity.
This is clear evidence that something is awry with your printer- Or it might be positional… that is, you appear to have the narrow hole at the top- closest to the build platform- so the facets are angling out as each layer is added. This might be resin clinging to the underside of these angled facets and getting cured by a laser spot that is not tightly focused due to some issue with optics.
If you haven’t opened a ticket with support, Do so and send them this and other pictures of the flaw.
I would tend to orient a model like this at a steeper angle… but this is a really strange and persistent flaw.