Created attachment 170846 [details]
Make sure you start with Standard Toolbar UI.
- In Writer, open View -> User Interface..., pick Tabbed, and click Apply to All.
- Switch to Impress.
-> Note the two extra toolbars (Drawing and Presentation).
They aren't there if the UI was switched in Impress.
Tested with LO 18.104.22.168.alpha0+ (3e4eb070787d4d44b3bdc95046e5b231dbbef42b) / Ubuntu.
Probably not a regression.