In most of iMx6 evaluation board VDD_HIGH_IN is supplied by a permanent source that is connected to VDD_SNVS_IN too.
When the PMIC PF0100 is switched off via PWRON input all the power sources are turned off and VDD_SNVS_IN is still powered but the problem is VDD_HIGH_IN is powered too.
Is the LDO that use VDD_HIGH_CAP is still ON ?
I did not see any sequence requirements on VDD_HIGH_IN, so is it possible to disconnect it from VDD_SNVS_IN and connect it to AUX_3V15 (SABRE board) ? of course VDD_SNVS_IN remains connected to the permanent source.