Yes, we have the problem with freeze friendlies the last days
https://forum.topeleven.com/bugs-tec...-game-bug.html

I removed a good friend today because his friendly game froze very early and my schedule was stuck there.

About the injuries, it's just happening.
But it not so bad in your case. You know the rule that a player cannot have another injury for the next 10-12 days so you are sure now that those players won't get an injury during critical games (semi/finals).
You 're an old player so you must have some hundred/thousand reds, so no problem.