Extra padding when vsdx are converted to pdf

Converting vsdx files to pdf produces extra padding. Here is how to reproduce it: Issue with Aspose conversion | Loom

Here is the original visio file:
Visio test.vsdx.zip (340.4 KB)

Here is the resulting pdf:
Visio test-Aspose.pdf (99.1 KB)

Here is what I would expect:
Visio test-Libre.pdf (84.4 KB)

Can you please let me know if this is a bug, an expected behaviour or an issue with the vsdx content?
Much obliged,