ADUM5411 VDD1 voltage out issue

Question

I use the ADUM5411 for isolate 3.3V and 5V logic. so I designed circuit as following : 
 I konw that the VDD1 is a voltage Input pin, but VDD1 is measured 4V. 3V3_MAIN is my board's main power, but it's voltage go up to 4V cause VDD1. 
 
 I know that VDD! is indpendent of VDDP as datasheet :

I don't know what's the problem?? I want to know if tthere is a any problem on my curcuit?

ManseungYoo · Accepted Answer

I find my mistake in my schematic. VE1 is Side 1 logic circuit as following diagram. (VDD1, GND1, VIA, VIB, VIC, VOD, VE1) 
 
 VE1 should be connected to VDD1. 
 Thank you for your interest and response.)

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ADUM5411 VDD1 voltage out issue