Shopify Messaging

This app integrates well with shopify and my store and has an easy to use editor. However, after using this app for the past year, it has suddenly gotten VERY buggy. It shuts down multiple times while I am editing my emails and no longer lets Grammarly review the text content - so I have to export it to another screen outside of the app to even spellcheck an email. It is extremely frustrating. I am looking at other options since I have really hit my max of dealing with frustrations on this. Also, tech help did not even respond to my request.