Hello,
[sb_private_reply]We Really Apologize about the Delays in replying to your Support Query and Really Really Appreciate your Patience with us![/sb_private_reply]
We have checked out your Website and it appears to be working as it should be. However, if you are looking for more control on this, then you can use additional Layer Settings to define your own Font Size specifically for different devices. You can easily set your Font Size and Line Heights according to the Device Size by setting the data-fontsize="['40','30','30','25']" to set Font Size of the Text Layer to 40px on Desktop, 30px on Notebook and Tablet, and 25px on Mobile and the data-lineheight="['40','30','30','25']" attributes for the layers. Complete Information for this can be found here: https://www.themepunch.com/revsliderjquery-doc/layers/ . Thanks for your Patience.
Meanwhile, do let us know if we can help you with anything else or if you find any further issues with Canvas.