Ivory Search Disappears on Mobile Sticky Header?

I’m using ivory search premium for my mobile version and have I have 2 questions which I hope someone can help with.

1. I’m using a sticky header and when the user scrolls down the search icon disappears

2. When phone is switched to landscape the icon appears on top of my site logo along with the desktop search to the left.

Screenshots to help explain:

This is correct & how I’d like it to appear on all smaller mobile devices:

https://www.mishmashorganics.com/wp-content/uploads/2021/12/mobile-screen-1.jpg

Here is what happens when user scrolls down & sticky header activates:

https://www.mishmashorganics.com/wp-content/uploads/2021/12/mobile-screen-2.png

And here is what happens when the phone is rotated to landscape:

https://www.mishmashorganics.com/wp-content/uploads/2021/12/mobile-screen-3.jpg

TIA for any help you might provide!

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