Troubles uploading large iOS Voice Memos

Hi,

 

I'd like verify if anyone else is able to upload "large" iOS Voice Memos from the iOS 11 Sharing Dialog to OneDrive for Business?

Small files work just fine and upload instantly. Larger ones, like 40-50MB (about 1h to 1h30min) keep getting stuck at a few KB and error out without any further information.

Is there somekind of limit we're hitting or is this possibly a bug?