One way Packet lost between ASR 9k and HP switch

Hi, I'm having issue with packet loss between 2 device point to point. HP to ASR no packet loss but when pinging ASKR 9k to HP I have a consistent packet ko of 7 out of 1000 but when using a smaller value of 400 datagram theres no packet loss. Both device connected via fiber optic. tried replacing the cable same with transferring to other port but got the same result 7-Packet loss when using value of 1500.

Verification:

Both supports higher MTU value, running hardcoded fullduplex/100, no interface error/drops, normal CPU and memory.

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No filtering, QOS applied on the interface.

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Any input about this?

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Thank you