Positioning the slider on 64 occurs only when the first button is pressed. If you then move the slider, pressing the button does not change its position by 64.
Are you using Android or iOS? I just tried your project on Android and the app crashed as soon as I pressed the button.
I have this problem when using iOS 10.3 and 11.3. I launched this project on the Android 7.1 emulator and the crashed app too.
Setting the slider to a value crashes the app for Android for me too.
@albert Will it be solved soon?
Thanks for flagging this. On Android, it looks like you can set the initial value in the properties for the Slider but not the blocks unfortunately.
Will file a bug on our side and hopefully have it fixed soon -