Preview in Page Settings shows a wrong size if scrolling pages is vertical

3.0.5/ Windows10

1) Default score
2) Edit -> Preferences -> Canvas -> Scroll Pages: Tick "Vertically" -> Ok
(or load the test file): 1Vertical Preview.mscz
3) Format -> Page settings: Preview

When loading the test file with the 2.0.3, you get the expected result:

But with the 3.0.5, the size is completely disproportionate, with a partial display therefore.

• As expected if scrolling pages is Horizontal: Horizontal Preview1.mscz