When spectating (on PC) in quickplay, if you are watching a Junkrat player and they use their Riptire; as soon as they detonate the Riptire, or if it is destroyed, you will automatically begin spectating another player instead of the original Junkrat player you were watching. I believe this is unintended.
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UPDATE 07/02/2018: I can confirm that this is still an issue in the current patch 1.25.0.1.47946 (on Windows 10).
UPDATE 07/13/2018: Still awaiting reply on this from a dev.
UPDATE 07/13/2018: I can confirm that this is still an issue in the current patch 1.28.0.1.50951 (on Windows 10) Still awaiting reply on this from a dev.