A screenshot would probably be helpful to understand the issue. I try:
There is currently the same date shown twice. I would expect to see the “Release date” on top. The “Original release date” is shown on the bottom and named accordingly. This looks like a possible bug to me, because I can’t see a reason for the current redundancy in the dates displayed. Both dates are know to Roon for this album:
I also made sure that Settings|General > “Album dates for sorting” is set to “Release date” - not that I would expect that this has an influence on what’s displayed on the album detail screen.
PS: As it seems to me that this is a (possible until confirmation) display bug and not a metadata issue (metadata is available), I move this to the support category of the forum.