What could cause degraded CS CSSR in Hauwei with high SRB reset

Degraded CS CSSR in Huawei due to RNL in added carrier, no uu fail nor uu no reply but high SRB reset, what could be the issue ? and how to solve it ?

How many carriers and what is strategy?

3 carriers, all R99 and HS capable. Blind ho activated, drd thd -92

Drd rollback switch activated?