Boxer bf clone issue....

Hello all,

I just bought a boxer bf clone from fasttech. Just wanted to try out a squonk. Anyways I heard plenty of issues with the 510 and just over all quality . But honestly for 15 dollars , what can you expect ? Well my issue is that every time the positive and negative connection are done connecting , there is a small spark. I have never seen this in my life. Honestly I just wanted to see if anyone has ever seen this on a mech squonk? If there is nothing to worry about? Or if there is a way to fix this? I eventually plan on replacing the 510 and even replacing all the contacts. But just for now , I wanted to get everyone's opinion.

Thanks!