Known issue. You can use setting parameter in #slide(setting: ..)[], see document.
Known issue, this is the expected behavior. Touying can only duplicate your content multiple times without being able to determine how many pages Typst has displayed for these contents. You should manually divide long slide into multiple slides.
The minimum reproducing code is attached as follows:
I find in two conditions, the
#pause
command does not work normally:#set text(size: ??pt)
exists