Cisco ASR920 output drops, even when there is no congresstion

Hello my dear networking fellers.

I am facing a strange issue with output drops on noncongressed interface at ASR920. These are not policy-map drops, since none are applied on ports.

diag:

https://imgur.com/uoFZDPI

Primetime 5min averages max (Po1 ~ 1.36Gbps, Gi0/0/1 ~ 530Mbps, Gi0/0/2 ~ 850Mbps).

stats:
https://hastebin.com/raw/dekazuceri

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The problem is that there are output drops present on both gi0/0/1 and gi0/0/2, even in non primetime. Naturally the drops increment much more faster during prime. Also they increment faster on gi0/0/2.

I have already tried extending output hold-queue, disabling input FC, but no luck.

Have you got any ideas, what is causing ASR to drop the packets on output?