Missing grouping from Serenade in D K.185 by Mozart

Hello,
the titles of Serenade in D, K185 and Serenade in D, K203 (all by Mozart) should be grouped:


Musikbrainz shows it correctly: https://musicbrainz.org/release/944b80e5-f095-4e8b-8bbb-f51f13d2314b
Please correct.