So if I understood you and the original paper correctly, this observation is not in conflict with the Standard Model or Lambda-CDM and that this is an observational outcome of general relativity. Is that a correct statement? If so, then those models may need to incorporate why this may have happened, right?
Edit: Thank you for the detailed post. Learned a few things from it.
Edit: Thank you for the detailed post. Learned a few things from it.