Broken Plugin in my theme

Hey guys,

can you tell me why your plugin is doing not so great under my theme and its doing great with Twentyseventeen for example?

I didn’t used the same classes or ID’s. So the plugin is default “display:none” so we have to put it on “block” to make it visible… But the plan looks horrible. The field are not overflow by hover, the other “filter” tables are all shown on one site, instead only visible when filtering etc.

Please help me to find out the problem.

Thank you!

The page I need help with: [log in to see the link]