Haven't seen anyone else report this yet. You might try updating the firmware. See: Model Year 2018 and Newer - MY18+ Infotainment System FAQs and Tips, and Firmware UpdatesI have no sound coming from the radio when in the FM or AM mode. SXM has sound. Call dealer ship they are puzzle? HAs any one had this happen?
I should note that the version I have currently is 19.22.70Just had this issue happen to me tonight - 19 premium with a 19 limited non-nav head unit. No audio from FM/AM but station identification and song info was displaying. Android Auto and SXM working fine. Restarting car multiple times, turning HU off and on did not resolve. Pulling the battery cable for a minute resolved it. Checked for update again (just updated last week) no update available.
Good to know it resolved itself without pulling the battery. Next time I'll just wait it out. Don't really want to try to get dealer service on it since I'm sure the swapped headunit falls outside of the warranty. Hopefully a future update resolves it.