Value gets filled on entity creation but no default is specified

I’m not sure if this is new, or if it’s something to do with my particular setup, but I have a field that is auto-filling with an undesired value every time I create an entity of this type (Project). There is no default value specified in the setup for that field. And it is not something that occurs due to a filtered view, as far as I can see (it happens when creating Project from a smart folder too). Here I demo the problem: