FM12 with Update 12.0.4.445: Only max-width for all images in Resonsive HTML5 output files

Hello,

bevor I update my FrameMaker, FM generates image-tags with the correct max-width in Resonsive HTML5 output files (standard configuration):

<img alt="safety_text-info00004.gif" style=" width:100%; margin-bottom:-20.016pt; max-width:71.135pt;" id="image17" src="safety_text-info00004.gif" />

After the update the max-width is always 100% or nothing:

Resonsive HTML5 output files (standard configuration / option change image width to relative width):

<img alt="safety_text-info00004.gif" style=" margin-bottom:-19.266pt; width:100%; max-width:400px;" id="image17" src="safety_text-info00004.gif" />

=> max-width:400px is larger than the width of the image (94 x 16 pixel)

Resonsive HTML5 output files (standard configuration / option do not change image width to relative width):

<img alt="safety_text-info00004.gif" style="margin-bottom : -19.266pt; " id="image17" src="safety_text-info00004.gif" />

Is there a bug in the Update or there are additional settings?

Regards

Oliver