I have no experience with high temp resin but I agree with @KenCitron : this looks like there’s an issue with the ammount of light getting to the part.
Have you tried printing this :
and looked at the result ? This .form file tends to exaggerate the issues related to the path of the laser and will help in telling whether you should clean anything. In all cases it’s a good opening point for a Formlabs ticket if you want to speed things up.