Post processing using alot of frame time despite disabled? Also Filter Translucent Volume?

Thank you for providing me with this bit of information.

Have you set up your project for the proper targeted platform and hardware?

From looking at the overall times, your Scene render time is reduced by .03 ms after turning off the Translucent Volume Lighting. Notice also, the location of the small pink bar within your scene and how it has changed its order. That is the SSR Temporal AA.

When you select the correct platform and hardware, your default post process settings should change along with it.

Target Hardware

Default Post Processing and Mobile HDR

Check to make sure these are setting properly. Let me know if this helped resolve your issue, or if you have further questions.

Cheers,