Can no longer minimize LUA terminal editor; bug?

Is this a bug that we can no longer minimise the terminal editor? After trying to minimise it to the task bar you have to re-initialise it from the tools menu, the same as closing; a bit of a pain.

or is this to do with the new window handling in 3.0?

edit: just found I`d metioned this before here, but it probably deserves its own thread: