I ve not had a problem charging from 11.30pm until 5.30 am. I pause Ohme until 11.30 and then un-pause it to let it charge. The Ioniq essentially lets it charge to the desired 90% and stops the charge. It is one complete charge.
When you unplug and open the ihme app it shows 2 charging sessions.
The first one is 11.30 until midnight.
The second is midnight until 5.30.
It is one complete charge but shows the cost for each session for costing. It is because the small charge session is one day and the larger session is the next day.
Its just an accounting bodge.
No problem switching off dynamic charging and switching to Max charging, but I do that when I set Ohme to pause charging.