Need help troubleshooting a battery repair.

I recently did a battery replacement on a Surface Pro 4. The repair itself went off without a hitch, but after I made sure everything powered on and put the screen back on I noticed an issue. When not connected to a charger, the laptop will boot, be fine if it’s not moved, but as soon as it’s bumped, even from an aggressive key press, it will lose power. I think that maybe the battery contacts on the PCB might need to be cleaned, but I would like to hear everyone else’s opinions in case that isn’t the issue. Thanks!