[Converting 32-Bit EXR to 16-Bit is doing weird things]

I just found something that sounds like its exactly the issue I am having but they were using Photoshop so I am not entirely sure. They said the problem is that you need to work in linear Space which happens automatically in 32 Bit but not in 16Bit.

[Converting 32-Bit EXR to 16-Bit is doing weird things]

By converting individually I just mean that I don't merge them together before converting. When I compare the top Layer with the composited layers in 32Bit both look identical. When I do the same in 16Bit they are different. 

[Converting 32-Bit EXR to 16-Bit is doing weird things]

I'm sorry for the bad title but I have no idea how to describe it better. Basically I wanted to export a very simple blender render as an EXR and than composite it in AP. All of that worked as I had hoped but when I tried to convert it to 16 or 8 Bit (because I wanted to export as a file format that my drawing program can use) something happened that I just can not understand. This is (1) what the composite is supposed to look like, (2) What it looks like after I converted to 16 Bit. (3) The Layer that seems to me to cause the problem (first is in 32Bit, second in 16Bit) 

 

This is the file: sphere16bit.exr

Now what I don't understand is how its possible that if I merge the layers together and then convert to 16Bit everything looks the way it should but it doesn't work if I convert everything "individually". Also I don't get how if I convert it back from 16Bit to 32 it looks correct again. I'm pretty sure this is just me not knowing what's going on but I really want to know if there is something I can do to keep my layers not merged but also convert to 16 / 8 Bit while still having it look the way it should. 

[Why do blend Modes get rasterized?]

I am not sure if I am overlooking something but I wanted to load an svg file that I created with Designer into Rive (the 2D animation web tool). I did not expect it to immediately work because everyone seems to implement SVG files differently. The result however was way worse than what I expected and after some testing I found that one problem are the elements that have a blend mode other than normal. For some reason Designer exports those as rasterized images and I dont understand why this happens. As I understand it you can just add a blend mode to the style attributes in an svg file so why do they get rasterized?

[Gradient doesnt work when importing to Resolve]

I wanted to import an SVG file that I exported from Designer into Davinci Resolve but the Gradients don't seem to survive this. They Just turn into a solid black. I tried the same thing with Inkscape and it worked so it would like to know if I did something wrong as in is there something specific I need to do so that it works or is it possible that Affinity uses a different SVG specification and that is why it does not work?