Glad to see more film people showing up, so welcome. Maybe now the Corrections queue in this world will get a higher priority bump.
Linking Cinema titles and their Disc equivalents can be tricky. The idea is exact match, so if your disc entry is simply called "A Star Is Born", it won't link at all because there are four movies in the database with that title from various years. Those entries feature the date of the film's release in [brackets] following a space after it's title entry, ie, "A Star Is Born [2018]", and the matching Disc or Cinema title should share that exact naming convention.

When adding new titles to either world, it's a good idea to do an IMDb search to see if there are multiples; if so, be sure and include that year in brackets even if it's the only title in the database at the time because someone will eventually create one of the other same-named entries in the future.

Best to know this in advance before making the same error(s) many of us have in the past (and still do, it's an easy error!)