Why are my texts cut off on smaller screens?

The Smart Slider’s responsivity is based on three screen size changes, and in the Edit Slide Global fonts, there are three different font size values for these slider sizes, which will increase/decrease the font sizes, and if your texts doesn’t have enough space in their layers, then they will be partially hidden, so what you should do is to either go to your slides, change the view to tablet and mobile, and change the layer’s size and position, that your text would look fine. Or you could just change the three font size values to the same. You can read more about the responsive options in here.