XZ2c Kamera audio recoding starts 5s later

[schattenlord]

Hey everybody,
Got a brand new XZ2c. Latest Updates installed.
While taking the first test video recordings, I've noticed that the first 5 seconds are always mute. Then audio starts.

Tried to play around with some settings reading resolution, HDR or storage local or on SD card.

All the same. Any ideas? Did I miss something?

Thx in advice

Edit: phone factory reset didn't help.