Adding ion-element-menu { position:relative; } fixes the map but the side menu screws up. Can you confirm you can still see the sidemenu when you clink the triple bars at top left corner?
Because of how that plugin works, you might find that something you should do is make the side menu’s hide themselves when they are closed. Side menus normally still exist under the center div, but that map plugin makes the center div transparent and shows the native map underneath so you can see the side menu’s.
Also, you should remove your keys from the command in you post, or others could take them to use and charge all the usage to you.