Is Rocksplosion supposed to be multiplying Mining XP by almost 18x?

https://reddit.com/link/1wiitwx/video/5o5l9oyc30qh1/player

I was wondering why my Mining was my highest level by far, haven't been paying much attention to it, so I decided to go do some testing to figure out why I was getting so much XP. Turns out doing this to one Copper node gives like a level and a half of experience. This isn't intentional, right?