Saving in PNG produces artifacts

[Matiseli]

Hello,
I try to resize PNG image. This is source image:

Good image

And this is (bad) result:

Bad image

I have this settings:

(https://ibb.co/rtSDFJY)

(https://ibb.co/bPtW6d6)

(https://ibb.co/9b7VzT4)

What is wrong?
Thank you for your answer

[xnview]

it's a 8bits+alpha, you need to convert it in 32bits (it will be automatically converted in future version)

[Matiseli]

I'm sorry, I'm a beginner. Can you please give me more precise instructions? Should I convert the image to 32-bit color depth and then shrink it? I've tried, but I'll lose transparency.

The image lose transparency after conversion.

Thank you.

[xnview]

right, it will be fixed in next release...

[Matiseli]

When can I please expect the next release? Next week? In half a year?
Thank you for answer.

[xnview]

in september i release XnView MP, so new version of XnConvert will be same month too i think...