Does SquareSpace delete images from your library if they're not used on a page?

For a website I work on, I did some custom css to put a larger play button on videos, which required a custom graphic to accommodate the upscale of the image used. To do this, I uploaded an image to the site's library and temporarily placed it on a page to grab its URL, then removed it from the page and used the URL to implement the change I was trying to make. And it worked. Until yesterday, when the play button disappeared. I looked through the site's image library and couldn't find the image. 

I don't remember deleting the image at any point. Is this something that SquareSpace does automatically if images aren't in use?

Hi there,

Our system will typically remove images from your library that aren't used on your site after 38 days. I wanted to share a quick update that you can now select/delete/upload multiple images at the same time from your site's library. 

Here's some more information about removing images from your site's library: 

https://support.squarespace.com/hc/en-us/articles/206542377-Managing-and-reusing-images#toc-delete-images-from-my-library