I talk with the people create the code you using (I think it is)
and they gave some help but it didn’t work right, maybe it will help get close to solve the problem
I added this code to JS I using
if (isRTL){
$('.lae-grid-container').isotope({
itemSelector: '.lae-grid-item',
originLeft: false
});
}
The problem is that to first item is getting left:0 and not right:0
while all the others are getting right: some-value.
(here is the link to the topic https://github.com/metafizzy/isotope/issues/1508)
Please fix it as soon as possible