The loading speed of the mobile cache is too slow. Have the mobile devices been adjusted? It used to be 3-4 seconds, but now it’s 7-9 seconds. Please check the performance difference between mobile devices and PC devices. There is something wrong with the configuration. This problem has existed for more than a month, and I thought the official would find a solution to the problem, but so far it has not been resolved.
Sorry to hear you are having some difficulties. How are you testing that the mobile loads of your zone are experiencing performance issues? How are you testing this? Also, what is the zone in question that is having issues with mobile performance?
In this link below it details some items that may help with Speed performance.