Topsy Turvy Interaction

Unrules question, Mark!How does Topsy Turvy interact with cards that end the turn, like Sundial of the Infinite or Obeka, Brute Chronologist?
The ruling says that "The current phase and/or step ends. The game skips straight to the cleanup step. The cleanup step happens in its entirety" and some players interpret this as "I get to have an infinite turn because I'm back at the beginning thanks to Topsy Turvy". However, I'd argue that Topsy Turvy would also change what it means to end the turn and thus the game would skip straight to the draw step (last of the beginning phase that's now the ending phase). Another view would be that the game skips to the next cleanup step, that is the last step of the now beginning phase of the next player's turn.What is your point of view on this matter?

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You do what Sundial of the Infinite says. Topsy Turvy only affects the normal order of phases. If a card jumps you to a certain phase then that’s what you do.