Hi,I had the same problem on my '04 S-Works Enduro.
The blue coloured threshold knob on the underside of the brain unit became very easy to turn,(not the fingertip shredding job that it usually is!),also accompanied by an oil leak from the same area.
Ended up sending the complete unit off to Mojo for a full service,& they replaced the seals in the brain unit as part of the service,which cured the problem.
It also needed a new shock body,plus a new air can too,the repair cost came to around £160 iirc,which at first thought is steep,but still cheaper than a new shock imho.