Sparks from AMP+ and PSU

IS it normal for a few sparks to fly between the meanwell PSU and the AMP+ when connecting the two together? After connection everything is fine though. Also the meanwell PSU barrel connector is slightly longer than the AMP+ female barrel.

Disclaimer: I got the PSU off of ebay since it was sold out (not in stock actually) when I ordered the Amp+ it is a genuine (or should be) Meanwell GS60A18-P1J. The construction is excellent and I don't think it's the PSU.


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