Tablepress Responsive rowspan

Greetings,
I like very much the Tablepress plugin and the responsive table extension.

I am using it here, https://act3international.com.sg/wordpress/drama-academy/

The “Class Schedule” table is set to responsive=”phone” and there are a few rowspan.

My problem is that in the mobile view, the rowspanning has caused problem in offsetting the data. How can I overcome this? Thanks in advance.