Work Manager on chinese ROMs like Xiaomi and oppo, when under battery optimization, increase the scheduled delay of work by several hours

Question

Work Manager on Chinese ROMs like Xiaomi and Oppo, when under battery optimization, increase the scheduled delay of work by several hours., however, I have noticed some apps

Answer 1

Xiomi MiUi 11 (chinese version of firmware) Work Manager very badly by default and runs in random order several times and after a few hours it just stops working.Further nothing happens. To solve the problem, I took 2 steps

1. Settings->Battery & perfomance -> App battery saver -> Select you application -> No restrictions

2. Settings -> Apps -> Permissions -> Autostart -> Add your application to autostart

After I added to Autostart and No restrictions battery. I rebooted the device and it worked correctly with Work Manager. I think that on Chinese devices that have heavily modified android, it is only possible to manually add launch permissions.