I have also been having a problem, though instead of it being analog delay, it's straight up controller connectivity problems. I normally have both my steam controller and my PS4 controller plugged in, but for some reason the steam controller/dongle is not recognized when plugged into the steam link. Furthermore, the PS4 controller allows me to move around in big picture mode from the steam link, but when I go to start a game, it doesn't allow me to change any of the configs to play certain games. While this is okay for most controller supported games, this makes me unable to play games that require remapping such as keyboard recommended games. I went to controller settings in order to try and fix the issue, but my PS4 isn't recognized as a controller, instead it's listed as a "X input controller". Also, normally there'd be a tab below the "your game" tab called "manage game" where I could change my inputs, but as no controller is detected, the "Steam Controller" options are not visible. Everything works fine when plugged into my PC, but for some reason nothing is fully detected when plugged into the steam link. Everything was fine before the patch, so I suspect that this recent patch is the culprit. Anyone else in a similar boat?