Did the FB syntax for delivery_estimate change recently?

[exruda]

I have been using these FB API codes for deliery_estimates for some time now, but I just found out the codes stopped working. As if the syntax had changed (it's not a queston of token/version, I can still download tables of characteristics). Did anyone experience anything similar?

[exruda]

I think I resolved the problem -- it seems to me that perhaps facebook might have changed the language coding of the output tables with characteristics (in Polish) and this somehow posed a problem. When I deleted the "names" from the syntax and left only IDs, the codes strated working again.