If this is a problem you want to see them solve, then we need to get a lot more users to ask for it. It's obviously not sitting near the top of their priority list for bug fixes and to get it to the top needs many more users to complain about it. It's the old "squeaky wheel" concept. Frankly it's keeping me from creating several new websites on Squarespace because I want my image galleries to be able to read the file metadata. So, if this is a problem for you also, add your request to Support so they'll get the message that this is important!!
Looks like it's a bug that's not a priority for them to fix, according to my discussion with CS. This creates a huge amount of extra labor, and given how many photographers use Squarespace, it's not a small issue.