Yes, this is a typical feature of delay-based congestion control. Especially, when cross-traffic increases the delay because the change in observed queue size.

Yes, this is a typical feature of delay-based congestion control. Especially, when cross-traffic increases the delay because the change in observed queue size. uTP also implements LEDBAT, which is a scavenger class of congestion control. See CC implementation details: https://tools.ietf.org/html/rfc6817 https://tools.ietf.org/html/rfc6817