Whether the XQUIC implementation does not seem to comply with the RFC 9000 12.2 ?

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RFC 9000 12.2
Every QUIC packet that is coalesced into a single UDP datagram is separate and complete. The receiver of coalesced QUIC packets MUST individually process each QUIC packet and separately acknowledge them, as if they were received as the payload of different UDP datagrams. For example, if decryption fails (because the keys are not available or for any other reason), the receiver MAY either discard or buffer the packet for later processing and MUST attempt to process the remaining packets.

By review the XQUIC source code ,XQUIC does not seem independently ACK different frames in the same package ? and lead to queue head block ?