I only have the problem in Chrome for mobile browser.
The accordion widget here used as a menu opens and closes again instantly.
However, when you press it for a second or 2 to and then release it, it behaves 'normal'.
Check it out: Home
Again, online on MOBILE CHROME APP
Respect and so many thank you's if you can help!
By the way: You would have found a result much faster if you use the search command and give in, for example, "muse, chrome, accordion".
Thank you Günter! I will search a little longer next time.