WHY DO I KEEP LOSING MY 50/50S EVERY SINGLE TIME IN WUTHERING WAVES

So i have been playing wuwa since lauch and also i started wishing in yinlin banner but since her banner i just kept losing everything single time and i also wished in every banner except for Zhezhi. I just want to know if its only me or is there other people Just another Info i for time to time buy the lunite subscription i don't if this is a helpful info