Sony A7R V exact same photos-different-broken exposure

[cinges]

I shot two photos at the exactly same time, with same settings, same lighting conditions (continuous mode). One have correct exposure, one is broken and overexposed. Why?? Shutter speed, iso, aperature, everything is identical, so photo should be also same, but it's not Why?
- Bracketing is off, and even if on, exposure time would be different.
- Using just continues drive mode
- auto iso settings
- auto ael
 
This happens randomly, sometimes 10 shots in a row are overexposed this weird way. Photo is then completely ruined and cannot be fixed.

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