So a common scenerio.
Import CD Release from Discogs has track times, added to MB okay.
Import Vinyl Release from Discogs has no track times
When I get to the Recording Tab I associate each track to the recording that was created for the CD because I know the Vinyl is identical to the CD Release.
When I go back and look at the release created it tracks times are all ?:?? even though each rack is linked to a recording with a known track time

Of course vinyl track times may differ slightly from their CD counterpart even if from same master recording but when no track length has been entered surely it makes sense to use the recording value.