Any chance of a fix in a maintenance release of 2018, or will it have to wait to 2019? It does make using the 3D Text tool very clumsy - not only does it default to Enter Text every time, instead of remembering what you last entered, and might want simply to place again or edit slightly, but you have to reset the Extrusion depth every time too.
Maybe you could add remembering the text to place at the same time as fixing the Extrusion depth bug?
I frequently forget to do either one or the other, so it can take two or three goes to get the right text to place at the correct thickness.