DOIs aren't treated as case insensitive

[thewilkybarkid]

Searching for the DOI 10.31219/osf.io/f7txy returns details, 10.31219/osf.io/f7txY doesn't even though DOIs are case insensitive.

Worse, it's actually resolving the DOI data the second time and failing with a UniqueConstraintViolationException (on the handle being doi:10.31219/osf.io/f7txy). Crossref always returns a lowercase DOI; I don't know if any DOIs have been resolved from a webpage where it's not all lowercase (as that may result in multiple entries with different cases).