Vertical text alignment goes wrong in objects within the Axure share app

I discovered a bug when using the Axure share app on an iOS device. Vertical center alignment does not work. When I publish my RP9 prototype and open from within the Axure share app, text on buttons (or all vertical aligned text) does not appear to be vertically centered. On a desktop there is no issue.

On this link you can see the yellow button is perfectly aligned in the vertical middle

Within the app it doesn’t (see attachment)

How can I solve this?

Having the same issue on iPad Pro using the app. I notice it especially in buttons, which seems to have the text aligned to the top instead of the vertical centre. The issue isn’t present when using desktop browsers.

Experiencing the same issue too unfortunately - safari AND chrome on ios touch devices only. Macbook, windows, android all look fine.