The technology is glorified suspension fork stuff. There’s a SRAM service video on YouTube that covers the whole thing and I’d be tempted – after checking the obvious like air pressure (valve in base of post, needs to be 250psi) and that there’s no obvious damage to the remote connection, collar’s not overtight etc – to simply tear it apart and rebuild it.
[video]https://www.youtube.com/watch?v=XcJanKYTr48[/video]
Also, if you google for stuck down Reverb, there are a number of home-brewed potential solutions. Did you bend the post do you think? I guess if there was enough out of trueness, it might stop it moving though the bushes.