AD420 issues at 12V

HEllo,

My customer is having issues when he runs the AD420 at the minimum specified voltage in the datasheet of 12V.  At 24 volts, no issues but at 12 V the current output range is cut in half.  I am attaching the schematic of this portion of the design in hopes that I can get someone familiar with this part to look it over and see what recommendations can be made to fix this problem.

Thank you,

Frank

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