Sounds like the charger is breaking connection. Either try unplugging it and plugging back in (maybe a different port if you have one?) or charge somewhere else. I'm not fond of charging from a laptop since you're essentially charging a battery from a battery.
I never use the battery that comes with laptops, except when our power is out. I keep it plugged in the all the time, and the battery is in a drawer. The batteries never seem to last as long as the laptop if I use them all the time. Maybe I'm not charging those properly either.
I unplugged it, and plugged it in another port and it stopped. This laptop is 8 years old, it might be the port and not the MVP. Whew.
Thanks so much!