Not entirely sure which side the problem is on, but if I export a folder as RIS from PaperPile and import it into my NIH NCBI bibliography to use their SciEnCV system to make a biosketch for a US federal grant proposal, the conference publications are missing their proceedings titles. I see them in the RIS file, as T2 fields. I don’t know if NCBI is looking for a different field or what the root cause is here.
NCBI is a painful system; since I maintain a PaperPile folder of all my papers, being able to upload RIS from PaperPile and have my citations come through correctly would greatly ease the process.