On your smartphone you can select the option Battery under Settings -> Battery. All apps that have consumed power in the past are listed under Software. Here is also the Outdooractive App. Choose it.
Under Settings you have to select the following options:
1. Deactivate power consumption warning
2. Under Start use the following configuration:
2.1 Manage automatically -> deactivate
2.2 Auto-Start -> activate
2.3 Secondary start -> activate
2.4 Execute in background -> activate
If you have selected the settings in this way, the recording should no longer stop at your HUAWEI.