Disabled recache, and now the LinkedIn login works with no issues, and no longer have to press F5 to reload the login modal for it to work. Having disabled this extension, I no longer see issues with old posts appearing when you click the site logo in the header - the latest conversations are loaded as expected.
Whilst I agree that this is a fantastic extension, it does indeed have some serious issues with compatibility. My forum is gaining a lot of traction now, and the last thing I want at this stage is a defective experience.