Signing credentials doubles the size of my app.

When I add my new signing credentials for cloud building (p12 file and provisioning file) the size of my game goes from 150mb to 300mb, does anybody know what may be causing this? this is a huge problem for me. If I change the signing credentials to my old bundle ID and provisioning file it goes back to 150 mb.

Thanks.

 

Looks like signing your game for app store will do a couple things to your game which increases the initial size but when it's uploaded to itunesconnect etc it goes back down, surprised nobody could explain this, but if anyone else is looking, here is the answer, this is also pretty annoying because, in order to get your game under 150mb, you need to constantly build, upload, check the size and then adjust it accordingly because even the final size on iTunes connect as a bit bigger than the build with no signed credentials.