[opencms-dev] Image scale bug still exists? Scales despite identical dimensions in 9.0

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Hi,

this seems to be still a problem.
Image data size changes if width and height are identical.
Further more if you specify a quality of 100%, the resulting size is not
the same as without using the scaling function.
I don't need to scale but just change the quality, so width and height
are always the same.
There are even some images, which are bigger (have more data) after
quality change to 90% than the original ...
I read this should be fixed since 8.0.4, but it still happens.
The color profile is removed while using the scaling functionality, too.
That's not acceptable for me.
I did the testing with no image export and no img tag, just changing the
query values in the browser url bar.
Are these known bugs?

Thanx for any hints, solutions, won't fix :D

Kind regards, Bernd