Steps to reproduce
Open a (large-ish) document in mind map view on the native Android app.
If the document is large enough (and thus has scrollbars on the right side and bottom) I expect to be able to navigate around the document by pressing and dragging (like normal mobile scrolling).
The mind map is not scrollable, despite there being scrollbars on the bottom and right side (and enough content to require scrolling). The mind map is still clickable, and I can press on individual nodes, however I cannot “move around” in the mind map as it is stuck in just a single fixed position.
Android 9.0 on OnePlus 5T. Reproduced the problem in both the native Android app and in Chrome for Android.