Modified image gets reset after html() in twig template; width and height not correct

[Rotzbua]

Environment

Grav: v1.7.31
Admin: v1.10.31

auto_sizes is enabled.

Example

Twig template

{# test 1 #}
{% set img1 = image.cropResize(1200,1200) %}
{{ img1.path() }} {# path to cropResize image #}
{{ img1.path() }} {# suddenly reset to original image #}

{# test 2 #}
{% set img1 = image.cropResize(1200,1200) %}
{{ img1.get('width')|raw }} {# original width not expected cropResize #}
{{ img1.get('height')|raw }} {# original height not expected cropResize, but not resets the image #}
{{ img1.html()|raw }} {# outputs correct width and height #}
{{ img1.html()|raw }} {# suddenly reset to original image #}

{# test 3 #}
{% set img1 = image.cropResize(1200,1200) %}
{{ img1.get('width')|raw }} {# original width not cropResize #}
{{ img1.get('height')|raw }} {# original height not cropResize #}
{{ img1.path()|getimagesize[0] }} {# correct width #}
{{ img1.path()|getimagesize[1] }} {# resets to original like test 1 #}

{# test 4 #}
{{ image.cropResize(1200,1200).html()|raw }}
{{ image.cropResize(1200,1200).html()|raw }} {# correct file, not reset like in test 1 #}

Output

{# test 1 #}
/images/d/9/7/9/5/d979577c736379ff6a39ce03de454b7218037681.jpeg
/images/5/e/4/4/1/5e44127351cd4a12f9aaeb4691c964e272f76321.jpeg 

{# test 2 #}
2736
1824
<img alt="" src="/images/d/9/7/9/5/d979577c736379ff6a39ce03de454b7218037681.jpeg" width="1200" height="800" />
<img alt="" src="/images/5/e/4/4/1/5e44127351cd4a12f9aaeb4691c964e272f76321.jpeg" width="2736" height="1824" /> 

{# test 3 #}
2736
1824
1200
1824 

{# test 4 #}
<img alt="" src="/images/d/9/7/9/5/d979577c736379ff6a39ce03de454b7218037681.jpeg" width="1200" height="800" />
<img alt="" src="/images/d/9/7/9/5/d979577c736379ff6a39ce03de454b7218037681.jpeg" width="1200" height="800" />

Expected behavour

• Output should not change if html() is called twice like in test 2.
• Output should be consistent like test 4.
• Furthermore the width and height should be from the modified image and not the original image.

Related issues

• Seems similar but just an enhancement? ImageMedium methods don't update width/height parameters #1058
• This issue could be the reason for my srcset issue [Bug] after image cropResize new size is not set #2307
• Maybe also related cropZoom() image upscaling #2342 and derivatives() ignores cropZoom() #2348

[mahagr]

Actually, html() and some other methods reset the image "by purpose". Also, the size of the image only changes only when the operations get applied. So the results are what I am expecting due to limitations in the implementation.

That said, I'm currently rewriting all of this logic for Grav 1.8; the size is now being calculated per operation, but I have not yet touched the reset behavior as I think it's being used in somewhere.