DM showing 'Unknown status, searching for it..' in Pleroma FE after a user has favorited a DM

How to reproduce:

1. User A send a DM using the Mastodon FE to User B
2. User B favs the DM.
3. On Pleroma FE, User A sees 'Unknown status, searching for it...' message. See below

Issue is not reproduced:

1. User A sends a DM using Pleroma FE and user B favs using Mastodon FE, so is an issue just on Pleroma.

Notes:

• I have checked if there are issues in pleromafe and none opened.
• The issue has been reproduced by another user.