NO BUG/SOLVED: Image: 'title' attribute used instead of ‘alt’ attribute if alt is empty (Slim SEO)

[SOLVED and not a Bricks bug] It’s Slim SEO that’s causing the problem. I had to disable a specific feature (image alt text) that overwrites the alt text, even if it’s supposed to remain blank.

Browser: All
OS: All
URL: I can’t share, access granted by IP address
Screenshots:

Image in Bricks

Alt filled, alt used

Alt empty, title used

On all my Bricks websites, I noticed that if no ‘alt’ attribute is specified for an image, its title is used as replacement.

This is a major issue in terms of accessibility.

Just tried on another website which use a template from Genesis and this is not the case. Alt is rendered empty (which is the normal behaviour).
Ditto on another one with custom templates, it’s fine. So I think it’s Bricks related. I tried also an Oxygen website and it’s also fine.

Is there a way to deactivate this behaviour? With a Wordpress filter for example?