Samsung Gallaxy, Spoilers text break the frame on andriod

Dear Sir,

Love the plugin, thanks.

Have an issue I can’t seem to find any threads or advice on.

As I’m using the Spoiler function, all three variations, it looks nice and clean on laptop/desktop and IOS, but I see that on Andriod the text in the spoilers ‘break out of the frame’ on the right side, in the sense it does not make the necessary line shift inside the spoiler frame.
e.g. http://indochinaexplorers.com/savory-saigon/

Can you kindly help this?

Thanks, and all the best Peter

https://wordpress.org/plugins/shortcodes-ultimate/