Pixelmator Pro 1 0 3

Pixelmator Pro 1.0 Whirlwind is a modern and more powerful rethink of the company’s affordable image editing software, with a few version 1.0 snags.

1. Pro 1 Rc
2. Pixelmator Pro 1 0 3 In 1 Head
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1. Pixelmator Pro 1.0.9 – Beautiful and powerful image editor. June 3, 2018 Pixelmator Pro is an incredibly powerful, beautiful, and easy to use image editor designed exclusively for Mac.
2. Pixelmator Pro 1.0.3 Release Notes: Fixed an issue that prevented using units other than pixels when changing canvas size. Pressing the Command-A keyboard shortcut will now select text in text.

This seems to be a new issue with 1.0.6.
In the original Pixelmator, in Photoshop, and in previous versions of Pixelmator Pro, it seemed like a low quality scaling algorithm (not quite nearest neighbour, but not much better) is used to generate a realtime preview while the user adjusts the scale parameters/handles, and then when the scale operation is completed a higher quality algorithm (bilinear? cubic?) is used to generate a great-looking result.
Now, when resizing a layer, I'm seeing really bad aliasing or sampling error that persists all the way through to export. It's almost as if the low-quality preview algorithm is also applied after the resizing operation is complete.
Original PNG:
Scaled to 50% in Pixelmator 3.7, then exported to PNG:
Scaled to 50% in Pixelmator Pro 1.0.6, then exported to PNG:
Resizing in Pixelmator Pro used to be one of my favourite features, since it seemingly was done non-destructively. That was fantastic, and I'd love for that behaviour to persist into the future. I just want to make sure that when it comes time to do a final render at the target size, that a high quality scaling algorithm is used.(Pixelmator Pro 1.0.9 on macOS 10.13.3 on MacBook (Retina, 12-inch, Early 2015))
(Color Profile set to Universal)
I was doing some work with primary colours and when applying the invert adjustment, I didn't get the colour I expected. I expect RGB(255,0,0) to invert to RGB(0,255,255), instead I got RGB(0,57,57). So I tried doing a hue adjustment of 180 degrees (which Pixelmator Pro lists as 100%) and got RGB(0,187,187).
Sensing that something weird is going on here, I applied invert to blocks of RGBCMY (ordered RYGCBM), flattened the adjustment and re-inverted it to see if it got back to the original colours. I repeated this by changing the hue 180 degrees. Results are below:
I hope you can reproduce the effect and hope you can tell me what is going on.
Thanks,

Pro 1 Rc

- Stef.

Pixelmator Pro 1 0 3 In 1 Head

Pro 1 Myanmar

P.S. There's also some strange blur happening between the boxes that have been inverted/hue adjusted. Zoom in to have a look.

Pixelmator Pro 1 0 3