Panasonic never fixed it. The way they designed V-Log L on the GH4, 8-bit precision is just not enough. The high compression hurts things also.
V-Log L is fine when you record externally with 10-bit precision.
For internal 8-bit recording, you just need to use a different photo style. Cinelike D is just as good as V-Log L when given proper treatment in post, such as my Logarist LUTs or Paul Leeming's.
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