My images uploaded in “media” are automatically renamed

Hello,

I have a website on www.remarpro.com, with the DIVI theme (vimade.ch) and I usually rename all my images before uploading them in “media” so that their title and link are interesting for my SEO (good-image-landscape.jpg). However, today when I upload my images in “media”, they are automatically renamed like this: BNN3A7~L.jpg.

Does anyone know why? And how would it be possible to come back as before in order to keep the name of my images?

Thank you in advance for your help.

I also apologize for my English and the information you might miss, this is the first time I post here.

Tanguy