RocketBoots

I've been having this same issue as well on the current 12" iPad Pro + Apple Pencil. This causes the path to start in the wrong position. 

I've also noticed that when using the Apple pencil with the pen tool Affinity will often place the point above or below where I have clicked - this happens near paths I've already drawn, as if affinity does not want me to start a new path on top of an existing one.   

Thanks. I literally just reproduced it as you posted. I've seen a few other posts too and this is definitely different behaviour to Photo. I'll pass the feedback on. 

Hi RocketBoots,
Go to menu File ▸ Document Setup..., Colour tab and set the Colour Format dropdown to Grey8 or 16.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

Cool! 

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

Nice job! Thanks

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.

This is a wacky contraption I designed for a Moshi Monsters game. My first professional use of Affinity Designer.