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LM5123-Q1: Is it safe to back-feed with voltage from output when shut down?

Part Number: LM5123-Q1

We are designing a system where we have one of the following power input scenarios:

- 12V available (which will be boosted to 24V by this circuit) 

- 24V available (which will directly power the 24V circuitry, hopefully not damaging the LM5123 circuitry by back-powering it some how)

- 12V and 24V available (in which case we were hoping to just use the EN pin to shut off the converter and thus break the circuit between input/output through the top FET)

Will this work?

The Vout/sense pin will have a voltage applied without other parts of the circuitry being powered on - is that fine? 

Are there any other aspects of this that are worth considering?