Home Slider edit option hidden

Hello, I’ve been using Polylang on my multilingual website for a while and I’ve noticed one bug. I use Ruby Theme (from ThemeForest) which has a Home Slider implemented to show featured content.

It works well with Polylang, I can translate it and everything, but when I want to edit the original content (what is shown, change the picture) I have to Deactivate Polylang first. Editing goes through Appearance – Customise and then between Custom CSS and Additional CSS is the Home Slider tab. The placement is important because Polylang isn’t blocking the option, but just hiding it for some reason. The Home Slider tab is still in the HTML code but I can’t access it.

Unfortunately, I’ve just come back to working on the site as a tech support after a year’s break and others didn’t report it. But I know that Polylang didn’t have a problem with Home Slider back then, so it had to be one of the updates that has hidden the edit option.