Work Item Form Group Height not setting to 100%

[pbcahill]

I am writing an extension that is extending the work item form, and adding a work item form group. I have a manifest contribution using the ms.vss-work-web.work-item-form-group type.

According to the documentation, if the "height" property is not specified, it will set the height to 100%. However that is not happening.

When I don't specify the height property for the contribution, it is clearly setting the height to "150px" upon inspection:

This is preventing me from setting auto grow related css styles so the height will dynamically adjust depending on the content rendered within the group/frame. I can see the height being inherited in the iframe level from the .external-content-iframe class is 100%. But that is only allowing the space to fill up to the 150px height set at the higher level (in above screenshot).

If I manually set the height on the contribution manifest, I can see the height property is set in a style tag at both the vss-contentHost div level and the iframe level:

So when the "height": property is omitted from the contribution manifest, perhaps it is only setting the height to 100% at the iframe level and not the parent vss-contentHost div level.