Unbalanced M2UA Link Load in M2UA Linset

I came across an unusual Problem in HUAWEI MSOFTX3000 Switch where load on all M2UA Links in a particular M2UA Linkset is not properly distributed.The M2UA Linksets are used for HSL Links for BSC. Only one of the M2UA link in the set of 4 links of a link-set is showing high occupancy while remaining are showing 0% utilization and resulting in M2UA Link Overload Alarms in Peak Hours.All M2UA Links are Healthy & Active. The Linkset on both ends are working in Load Sharing Mode

Can any body Figure out the reason