Anyone having problem with tabs not displaying properly

Our site theme is Souffle and I use tab code on a number of pages. Following upgrade to the latest version of Wordpress the tabs data stopped displaying properly. When the page loaded the fist text in a tab list was visible. After the Wordpress upgrade this no longer happened - no text was visible - and if I have two tab sections on a page clicking on a tab in the second section sends the cursor up to the first tab in the first section. I’ve upgraded to the latest Souffle version which was supposed to sort out tab and accordion issues - but the problems are still there. Does anyone have any advice?