Affinity Photo problems

[TypoExpert]

  Hi,

As you can see with the attached images,  the rendering of the same text or shape tools on Designer and Photo are not the same.

There are extra white pixels on the Photo version.

Same problem with Outer glow 

Settings:

Opacity:100%

Radius: 20.5 px
Offset: 47,4 px
Angle: 270

Thanks!