Bugs in content types

Hi.

I' searching for post regarding my problem since 2 hours, but I can't find a solution.

I installed the H5P plugin (1.10.1) for WordPress (4.9.5.) according to the instructions and everything works perfectly  - no error message or anything. But the H5P content can only be seen for a very brief moment when the page is loaded and then it's gone. I tryed several content types (including example-files) in different browsers on different devices - same result. And there is co extra code or anything (like tabs).

My Image Juxtaposition content types that I create aren't working in Firefox--when you click and drag nothing happens, or if it does work there's a big delay. Interestingly, the demo is working fine on H5P.org. Anyone else experiencing this? I'm using it for a translation exercise--overlaying a translated passage over one in the target language.

We are having issues very similar to that mentioned here : https://h5ptechnology.atlassian.net/browse/HFP-1870?workflowName=Software+Simplified+Workflow+for+Project+HVP+V2.0&stepId=11

We have done some testing and noticed that the issue is resolved as of IE11.0.57 (KB4096040)
But is still an issue on 11.0.56 and prior (IE10 aswell). Not sure if this can be used to work out what changed in this update?