Text in tab content (WP admin) often just disappeares

Hi all,

I'm new to this plugin and first of all I must say: it does a  good job!

But there is a small shortcoming making work with this plugin in the WP admin nearly impossible: from time to time the text in the content editor of a tab just disappeares. You have to reresh the page or re-open the accordion panel to see the text of a tab again. This is very bad and not practicable for daily work. Please fix this or give me a hint how to solve this issue - thanks a lot.

Greetings

Eric