Calculated BoundingBox for rotated objects is not correct

I am using Aspose.SVG_21.3.0 net40-client and this is my generated svg.

<svg xmlns="http://www.w3.org/2000/svg" id="AFO010-1-001_VK" width="372.5046" height="184.3707">
	<g id="AFO010-1-001_VK_layout" transform="translate(1414.315 -70.80673)">
		<g id="AFO010/1/001 VK_object" transform="rotate(335.8554 -1235.857 82.702)">
			<rect id="AFO010/1/001 VK_base" x="-1342.37912213802" y="-1.14887940883636" width="213.04345703125" height="167.701858520508" stroke="#FF0000" stroke-width="5" fill="#FFFFFF" fill-opacity="0"/>
			<g id="AFO010/1/001 VK_label" transform="rotate(39.14461 -1364.183 284.354)">
				<rect id="AFO010/1/001 VK_labelbackground" fill="LightGrey" stroke="#010101" stroke-width="0.5" x="-1409.34365308285" y="275.846970677376" width="90.32323" height="12.15332"/>
				<text id="AFO010/1/001 VK_labeltext" font-family="Verdana" font-size="10" font-weight="bold" fill="#000000" dominant-baseline="mathematical" x="-1407.34365308285" y="280.708298325539">AFO010/1/001</text>
			</g>
		</g>
	</g>
</svg>

I am calling

svgDoc.RootElement.GetBBox()

on the root element of the svg document and getting this

<rect id="calculatedBoundingBox" x="-1414.315" y="70.80673" width="372.5046" height="184.3707" stroke="Yellow" stroke-width="1"/>

as calculated BoundingBox.
Integrated into the svg it looks like this

<svg xmlns="http://www.w3.org/2000/svg" id="AFO010-1-001_VK" width="372.5046" height="184.3707">
	<g id="AFO010-1-001_VK_layout" transform="translate(1414.315 -70.80673)">
		<rect id="calculatedBoundingBox" x="-1414.315" y="70.80673" width="372.5046" height="184.3707" stroke="Yellow" stroke-width="1"/>
		<g id="AFO010/1/001 VK_object" transform="rotate(335.8554 -1235.857 82.702)">
			<rect id="AFO010/1/001 VK_base" x="-1342.37912213802" y="-1.14887940883636" width="213.04345703125" height="167.701858520508" stroke="#FF0000" stroke-width="5" fill="#FFFFFF" fill-opacity="0"/>
			<g id="AFO010/1/001 VK_label" transform="rotate(39.14461 -1364.183 284.354)">
				<rect id="AFO010/1/001 VK_labelbackground" fill="LightGrey" stroke="#010101" stroke-width="0.5" x="-1409.34365308285" y="275.846970677376" width="90.32323" height="12.15332"/>
				<text id="AFO010/1/001 VK_labeltext" font-family="Verdana" font-size="10" font-weight="bold" fill="#000000" dominant-baseline="mathematical" x="-1407.34365308285" y="280.708298325539">AFO010/1/001</text>
			</g>
		</g>
	</g>
</svg>

The calculatedBoundingBox looks very weird. It is not what I expected as BoundingBox for the given content.
Am I doing something wrong or is it a bug in the calculation of the BoundingBox?
Could you help me out, please?
Thanks in advance.

Best Regards
Joern

@comansoftware

We have logged an investigation ticket as SVG-121 in our issue tracking system in order to analyze this case. We will further look into its details and keep you posted with the status of its correction. Please be patient and spare us some time.

We are sorry for the inconvenience.