Was flying a very stabilized linked three axis approach a few weeks ago to 300-1/2 or so. Just after FAF I had an alert from a very excited controller about “excessive descent rate”. I disconnected the autopilot and hand flew the rest of the approach (after inadvertently giving about a 2g yank in response to the radio call). Landed uneventfully and called the tower to ask WTF was up, as I was never more than a dot off the GS or much of anything off the assigned altitude. Manager said that they concurred that there were no deviations, and “sometimes the computers just do that”.
Not entirely sure that technology is our best friend sometimes...