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DRV8243S-Q1LEVM: OLA fault in PH/EN mode

Part Number: DRV8243S-Q1LEVM

Hi team, customer use DRV8243S-Q1LEVM to do OCP test. but they find that OLA is asserted mistakenly when OCP removed, which is presented only in PH/EN mode and is normal in PWM mode. could you help me to find the reason of OLA fault?

the test load is inductive: 5ohms, 1.66mH

out 1 and out 2 both of PH/EN and PWM mode: 

out 1 : high for 200ms, high for 800ms, low for 200ms, high for 800ms

out 2: low for 200ms, high for 800ms, high for 200ms, high for 800ms