Do I need to provide any other information?
How much does your battery drain overnight?
There's three ways to look at the vertical line issue, whether it's normal, whether it's correct and whether it's a problem.
I feel like I've seen mine do that before, but I can't say for sure. It may or may not be normal.
It's almost certainly not correct unless you're doing something that would cause it at the time. I'm not sure how reboots look in the battery monitor.
It doesn't appear to be a problem, though. It looks like some brief periods where the battery reporting wasn't working correctly. It doesn't look like it's affecting your battery life and it's so brief that it doesn't really affect your graph.
What stands out to me in the picture you sent was the large amount of awake time when the screen was off. That combined with the media server comment makes me think you're listening to music using your phone, but I don't know that for sure. If you can explain it then it's fine, but it's worth looking into.
I'd look at your battery life and see what complaints you have about the actual performance you're seeing. So far I've seen complaints about what the battery monitor app is reporting, but nothing that suggests your phone is performing poorly.
FWIW, I think that GSam Battery Monitor is a much better battery reporting app than the built in monitor.