Text in Hebrew saved as question marks

I’d really love to be able to use this plugin. It’s what I’ve been looking for.

My problem is I’m trying to use it on a Hebrew site and as long as I write the news in English there’s no problem but when switching to Hebrew the text is saved as question marks.

I have no such problem with other plugins.

I’d really appreciate your help.

https://www.ads-software.com/extend/plugins/vertical-news-scroller/