Sorry for the slow reply.
Kindy, help confirm the information below:
1. Could you please provide the current firmware version?
2. Will the two headphone jacks of the device have this condition?
3. Go to Armoury Crate > Console, then you can see the built-in system modes.
Please switch between different mobile phone modes to confirm whether the battery saving mode limits the performance.
4. Please refer to the link below to enter safe mode and check if the ROG Cetra is capable.
[Phone] How to Enter and Exit Safe Mode? | Official Support | ASUS Global