Don't know, I think is because of the engine.
Viewing post in GothicVania Church Pack comments
Ah ok, thank you for the quick response.
I was able to fix the issue by removing the parallax camera multipliers on Lines 167 & 168.
Anyway, thanks for the YT tutorials and the free assets/demo -- its a really awesome way to learn and get into Phaser :)
EDIT: I just modified it again with multipliers again and it's been fixed since. Not sure what causes it now.