I experience phase reversal respectively input latch-up problems in a AD8675 buffer application and found this QA as only reference. Particularly the topic isn't discussed in the datasheet.
Saying no phase reversal as long as the input voltage stays in the specified range is a tautological conclusion. Keeping IVR assures normal operation, thus no phase reversal.
The problem arises if you drive AD8675 in unity gain buffer configuration from a high impedance source. A short spike exceeding the input voltage range seems to be able to latch the amplifier output at the negative rail. Input clamp diodes are pulling In+ down below the IVR, the circuit doesn't recover without removing the supply, or shorting the In+ by a lower source impedance.
For input voltages that goes beyond the supply rails, Over The Top amplifiers are more suitable as these amplifiers will not experience this. Do check out LT6015, LT1672, and other OTT products on http://www.analog.com/media/en/technical-documentation/product-selector-card/2PB_6015f.pdf and on http://www.analog.com/en/index.html