Please share the problem in detail , what all parameters you see in the system for such said cell site and all so that I can then suggest something .Also this phenomenon occurs when (any particular durayion or like that ???)
This is one of the legendary ericsson problems. Unfortunately the only way we could solve it was a hard reset of the TRX, if that didn’t work changing the RF cables. But that was like 6 years ago, am sure things have improved with their equipment.