Spotify Excessive Battery/CPU usage on Nexus 5 (4.4.2)

[MonkeyBussiness]

Description

When playing songs spotify (offline mode) causes excessive CPU usage compared to other music apps and maintains partial wakeclocks even after the song has been paused/stopped thereby draining the battery (about 4-5% an hour compared to 1-2% with other apps). Upon inspection of CPU frequencies I saw that Spotify almost always engaged the maximum frequency of 2.3GHz (Snapdragon 800) of a single core, while also sometimes activating the seoncd one, compared to other music apps which rarely forced the CPU above 300MHz. 

What are the steps you took to get to the error/issue?

Cached only a single song offline, looped it for an hour

What I expected to happen

Other music players when the screen is off, maintain the processor at 300mhz

Did you restart your device when troubleshooting in section B?

Yes, even did a full wipe through custom recovery

Did you read the connection troubleshooting tips?

Yes

Your device

Nexus 5

Device’s Operating System

Kitkat 4.4.2

What type of account do you have?

Premium

Space left on your device

10GB

Space left on your SD card (if applicable)

Not applicable

Space left on your External SD card (if applicable)

Not applicable

Is your device rooted?

Yes, however no further modifications (Eg Xposed, no tampering of system files)

Are you using a custom ROM, if so which one, exactly?

Stock Rom

Did you set your external SD card as storage location?

No

Did you manually install an older version before installing the latest version from the Play Store?

No

Do you have the same issue when switching between WiFi/Mobile Data (If applicable)?

Yes

If you said "No", when does the issue not occur?

My mobile Spotify version

0.7.9.1170

My desktop Spotify version (if applicable)

Not Applicable

My mobile provider and country

United Kingdom, Giffgaff

My username

APJackson20

Do you have a Spotify (non-Facebook) login?

Yes

Are you logging in with Facebook or with your Spotify login details?

Spotify

Do you have any screenshots you can attach to more clearly explain your issue?

No