It's called Auto forwarding.^^^^ This.
I have quite a few autoloading handguns. None of them are designed to slam the slide home upon insertion of a magazine.
Micro 9 section of the forum is becoming Soloesque.
Most modern autoloading handguns do this.
Glocks, M&Ps, H&Ks etc..
Most manuals explain this with a warning if you read them.
It is not a malfunction, but is a by product of design.