Hello,

Please try to update WordPress and all the plugins. This jump happens as one part loads quicker than the other one, if you wait for a second and let the page load completely, there is no jump.

WoodMart Layered Nav widget has the option to show the attribute filter as a drop-down: https://gyazo.com/9dd3689ca62b4939b31a08953e429e9c

You can find more options in this manual: https://xtemos.com/docs/woodmart/widgets/

If you have any questions please feel free to contact us.

Best Regards