Slide In - Many problems like disappearing one slide in from list and picture adding to a slide in..

Hi there!

At first, merry Christmas! I'll share 2 problems about Slide In plugin.

Here is a screenshot from our website related to a slide in which is currently active.

But this slide in is not appearing on slide in's list on admin side. Here is other screenshot:

Did add a slide in page change? I was be able to add a picture on a slide in before. But now, it is not asking me to add a picture. Here is my current adding page screenshot:

And the other slide ins created with picture before disappeared from slide in's list. But as I said above, it is still active on page which it is running on.

The team are very slow to solve a problem. And this is a problem as well.

I'm waiting for your response.