WIREGUARD-High Bandwidth on tx Interface of Wireguard -ROS 7

i have / arm64 / CCR2004-16G-2S+ / 7.20.6 (stable)at a remote Site, this router is connected to my datacentre router / arm64 / CCR2116-12G-4S+ / 7.21.3 (stable), the wireguard connects though and i run ibgp over the wireguard (site to site) i notice at certain times, tx values go high which affect RX, sometimes wireguard will disconnect entirely especially when tx begin to record high values, Any one face this challenge and how have you resolved it ?