Dissapearing in a few seconds

Hi Guys,

I’m very glad with your wordpress Facebook Sidetab, but unfortunately it isn’t showing all the time.. It dissapears after a few second as soon as my site is loaded. You can check it out by. https://www.bouwen.geertruidseboys.nl . Can you guys help me to solve this problem?

Many thanks in advance!

https://www.ads-software.com/plugins/be-it-facebook-sidetab/