I think I came across a bug in behavior of Studio Pro when designing table structure using "diagram" feature. Upon clicking "apply", instead of creating tables and other corresponding objects in the schema of our choice (the schema we clicked on first before tediously creating our masterful table layout), Valentina picks up first available schema and that's where she wants to create it. See attached screenshot. For a while it drove me nuts that whenever I tried to create tables using 'diagram', I was getting access denied all the time. After looking closer it appears that it always wanted to created tables in the temporary 'toast' schema. Once I disabled in preferences the display of system schemas, I am allowed to create tables except not where I want them.
Could you, please, add it to your next patch release?