I have seen this issue reported below, but I wanted to flag it, too.
As an example, I have three players loaned out to SC Freiburg who are all registered by the team and on loan contracts until the end of the season. But they are each listed as "Unavailable to play due to imminent end of loan contract." Each was on loan with SC Freiburg the previous season. That previous season, each player was able to play. I am uploading files of the save game after the bug and before the bug, although the save game before the bug is several in-game months before I learned about this issue.
I have seen this issue reported below, but I wanted to flag it, too. As an example, I have three players loaned out to SC Freiburg who are all registered by the team and on loan contracts until the end of the season. But they are each listed as "Unavailable to play due to imminent end of loan contract." Each was on loan with SC Freiburg the previous season. That previous season, each player was able to play. I am uploading files of the save game after the bug and before the bug, although the save game before the bug is several in-game months before I learned about this issue.