Military bug, am i missing much?

At the end of C3 and realised i have the (Military rank not upgrading past lev 1 ) bug, which means as i go into C4 i will fail the event…

Questions

1 - Failing the event, am i missing much? Apart from a little xp and some end game slides?

2- I hear you start off at level 5 in Chapter 5 so it starts again? or will it also not increase past Level 5 as i didn’t do it from level 1?

So, does it mean i have to start the game again? Or am i not really missing much?