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Solution: update JDK to the one of recommended versions: 8, 12, 14.
11. When two or more streams are playing on the same page in Chrome browser on some Xiaomi devices with MIUI 12, the first stream pucture may twitch
Symptoms: when two streams are playing on the same page in 2 Players example, the first stream picture is twitching, the second stream picture flashing over the first one
Solution:
a) use MIUI 11 on Xiaomi device
b) use mixer to play two or more streams on the same page