Does Picard check acoustid web service /submission_status after submitting a fingerprint?
Does it cache submissions and check at future start-ups?
If not… in cases where there’s a significant processing delay at acoustid.org (I’ve currently been waiting about 24hr for a single fingerprint in pending), this can result in situations where a submitted fingerprint file will show up as unsubmitted in the Album Pane if the program is later restarted (resulting in confusion / potential duplicate submissions, etc).