Tubepress Pro – Jumpy Thumbnail CSS

Hi all:

I am using Enfold and Tubepress Pro and am experiencing css issues with the thumbnail display of gallery images on responsive sites.

When hovering the cursor over any gallery the thumnails “jump”.
Please see this recorded gif: https://gyazo.com/65a940e44ff4ad4220d593da0922976b
The effect is especially severe on responsive smaller browser windows, iPad devices etc.

I researched previous issues with Tubepress and came acrtoss this thread on your site: https://kriesi.at/support/topic/enfold-tubepress/ However the recommended fix did not work for me.

Please advise how this issue can be fixed for various responsive display sizes.