Ionic 5: input focus scroll assist on iOS broken

Hi. Input focus scroll assist (when touching an input at the bottom of the page the page would scroll so the input get above the keyboard) on iOS is borken since IONIC version 4.9.
Here the issue on github:
I created a new project with 5.0.4, input focus scroll assist does not work as well.

Here the source:
Here a short video (input ‘test’ should scroll above the keyboard):

Has anyone of you brought that up and running with scroll assist? For me it is not usable without scroll assist, I have to use IONIC 4.8.1 until the bug gets resolved…