WDR has an absolutely stupid implementation on this camera. It works inconsistent, by increasing suddenly the noise... The noise (color and luminosity) is huge, the shadows are blown up, the black became, in fact.. a dirty violet. And also random banding and flickering. They should find a fix in next firmwares, because this feature DOESN'T work corectly.
Anyway, if you want to keep it active, at least reduce the EV value to -2/3 or even -1. It could alleviate a bit the terrible experience of using WDR.
I don't know how it woks now on A119V3, but in oldest firmwares WDR worked pretty nice:
WDR videos V3: