Default [Q] Battery status problem

When I connected my Tab Pro 8.4 to my laptop just now, the battery status jumped from 93% to 100%. My workaround solution is to charge the tablet with the USB wall charger and wait for it to indicate a full battery to know that it is truly at 100%. I will get a notification to unplug once it's fully charged. From there, I think that the battery status is accurate...until I connect the tablet to my laptop again.

Why does this only happen when I connect the tablet to my laptop? This doesn't happen every single time, but enough times to cause annoyance. Is there a better fix to this? Thanks...