Hi,
I’d still be careful. Have you run the model with sample_prior = "only" and used pp_check() to see how the priors look like?
Make sure to check that \widehat{R} < 1.01, that neff is more than 0.1-0.2, and that the trace plots look alright. It seems you have a Bulk_ESS which is close to 0.1 (if you ran with four chains each with 2000 iterations).