It is a known bug that sometimes the game hangs in the after mission report screen and as far as I know there is no way out with saved games from the tactical part of this mission. The only way I can think of is to load a save from before this mission, but not really sure, maybe you have to do something different before this mission. I was lucky to not get this bug yet, so no experiences what can help out of it.
Some general advices from my experience:
- If you have a lot of saved games, then thin them out, it looks like that the game has some issues when there are too much saved games.
- Deactivate cloud saves, especially with the Epic version, this feature looks like pretty buggy, not only with this game.
And finally, you will not receive a confirmation of your bug report from SG, but I’m very sure they will get it if there was no error while reporting.