My footer slightly changes all the time

Hi,

I cannot give access to the website where I face issues because it is password protected.

Instead, here are three links to screenshots I took that illustrate my issue :
https://www.noelshack.com/2019-07-5-1550243320-normal-footer.png
https://www.noelshack.com/2019-07-5-1550243332-change-in-button.png
https://www.noelshack.com/2019-07-5-1550243337-change-in-button-zoom.png

– On the first image is my footer as I want it to be. Sometimes, it does appear like this but sometimes, I have one or two of the folowing issues described in image 2 and 3.

– On image n°2, the blue button appears bigger for no reason

– On image n°3, the blue button appears bigger + the background image is a little zoomed in.
Thus, the floating bus on the rightside appears “cut” by the rightside of the webpage. Also, I noted that there is a bigger white space between the top of the footer row and the first words “Nous trouver”, “contact”, “Menu”, “Informations”.

Any idea how to resolve that ? Maybe it is not related to beaver builder header footer plugin ?

Thanks everyone,

Philippe

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