I have seen this happen a couple of times as well while using my Levition EVB320 series (32A) charging station. Once it skipped a scheduled charge completely, and one other time it seemed to abort all on its own while a previously scheduled charge was subsequently in-progress. Most of my charges do reach successful completion, but have generally not aligned with what was "projected" by the car itself per the center console's previously reported charging. In some cases the charge was completed (verified by EnTunes email notifications) about 30 minutes early - sometime more - before the actual scheduled time for completion.
The latter is not so much an issue to me, so long as the earlier time for charge completion does not inadvertently back up to BEFORE the (earliest) scheduled START time I have set up on the center console. Should that occur, then "scheduled" charging operations would become self-defeating and may coincide with higher utility company "TOU" electric rates, (which in my area are before midnight on weeknights).
I have three possible theories for these misguided behaviors:
1. There may be too much mechanical "stress" on the charge port connector, especially when the charger cord is stretched to reach the port by the full length of the cord (25' in my case) to reach the car. In that situation, a lot of dead weight rests on the connector and may cause some sort of "poor connection" (and potential overheating) when high current flow begins. I have read in the Leviton user manual something to the effect, that too much stress will cause a charging operation to terminate. This might explain a schedule start that never occurs. However, I am not seeing a FAULT detection LED upon plug-in, which of course, should be expected if the charge cord is under too much stress initially upon plug in.
2. As for the schedule charge duration misalignments, the RAV4 EV only recognizes an EVSE LEVEL 2 charger that outputs at 40A (or possibly 30A), but not 32A, regardless of which Leviton charging station is being used.
3. The charge port connector plug on the end of the charging cord is not fully "latched" in place via the trigger, release switch. The latch swtich probably has an electrical interlock associated with it and if not fully or properly latched, a charging "command" will not be activated, as scheduled, which would be unknown by the user in a delayed start (or scheduled) charging operation because s/he is not present at the time the charge was suppose to activate.
Btw, I have 2012 Chevy Volt I often schedule "delayed start" charges as well using the same Leviton charger. That EV always charges as expected, and has NOT exhibited any such aborant behaviors.
Bottom line, are these charging issues the car's fault or the charger's fault, or some combination of both? Unfortunately, it does not seem quite possible to determine which strictly by owners' observations in the field. However, it might be that the J1772 standard is not that mature and there are some things it may need to address to be more "idiot proof".