Conflict of widget names causing overwrite

Hello, great little plugin but I have one problem:

I have two wiedgets, one called w1 and the other called w2.

Both contain 3 text widgets and can be seen on my homepage, showing images.

When I go to save w1 text item 2, it also overwrites w2 text item 1.

I guess there is a naming conflict here but I cannot fix it. When I go to rename the widget in the plugin screen in WP admin, to something completely different, I lose the layout on the homepage.

You can see it in action here:

https://dev.self-storage-hampshire.co.uk

Thanks

https://www.ads-software.com/extend/plugins/widgets-on-pages/