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I know this happens to me, and in my case, it's typically due to TuneIn having a buffer when streaming. I get annoyed also, especially when 'all things considered' is on. The buffer will run out from your previous session, at this point it's catches up live. Not yet looked into how to stop this on the Tesla. Might be a good excuse to do so.
Supposedly this and streaming issues in general will be corrected in a firmware release. I suggest reporting it to Tesla though to keep the focus on it.