Drop down containing & character is not saved

Dear developer,

excellent plugin!

Just a tiny issue.

I’ve added a custom post type, and a custom field on that (a drop down)

One drop down option has & at it’s name, which is saved correctly.

But when i choose that value in a new post, the option having “&” is not saved, and the field remains empty.

https://www.ads-software.com/plugins/custom-content-type-manager/