Huawei — honor 6x ram management issues

After getting the last update for my honor 6x bln-l22c675b330, the ram management has deteriorated significantly. Previously after the nougat update around 2.2 gb used to be free of 3 gb. But after the update only 1.7 gb is free. The app's doesn't stay in background anymore and the phone starts to lag if many apps are opened. Please solve the issue.