When querying the Materials Project for XAS spectra by material_id using mpr.get_xas_data, several hundred materials that I successfully queried back in Oct. 2019 are now simply returning an empty list (the call to mpr.get_data returns an empty list for all fields, including spectrum, elements list, etc.). Here are just a few examples for which this is the case: mp-25485, mp-540710, mp-617011, mp-31593, mp-25681.
I tried converting from task_ids to material_id, but for all the examples I tested this did not resolve the problem. I am wondering if that data is intentionally missing by default or if this is a bug, and if so, if the data are still accessible somehow? Thank you for your help!