I confirmed with the team that a fix was made here and released very recently. The changes may not have made its way to your database just yet, but one thing to try for now is an auto re-identification of the album.
Go to the album page
Select the 3 dots option button and chose Edit
Scroll down on the Album Options tab and choose Re-Identify Album
I typed “Mahler Inbal Tokyo” into the artist side of the manual search before i could get it to work.
I tried “Eliahu Inbal Tokyo” first which shows me virtually every other Mahler Symphony they’ve recorded but not the number I wanted, despite Mahler: Symphony 3 being in the album search!