I have noticed the same problem today. I left my phone to charge for at least 3 hours, and when I came back to unplug it, I realized that it was still on the same level. The indicator was blinking but there was no charging. It was the first time it had happened to me and I immediately associated it with finally getting CSSU to open by entering the code:

sudo /opt/CSSUfeatures/updateTransitions copyDefault

But later on I updated CSSU to the version 2.5 and I managed to charge the batterly full. The green light went on. I'm not sure about the performance of Battery Graph though. I think it's acting a little strange.

Whether the charging problem was just a one-off thing or a more serious issue remains to be seen.

I forgot to mention that to make it charge I had to switch the phone off.