This is an issue the team is aware of and that we have plans of addressing in the future but it is technically not a bug but a feature request (will explain why), we already have a feature request logged for this and are considering its priority relative to other features we have on our roadmap.
Explanation: As HDR rendering combined with physically based specular materials can produce very bright and small highlights (often smaller than a pixel), the highlight can come in and out of view when in motion, and combined with the reason that Bokeh DoF does uniform weighting of pixels (which produces the even circular effect associated with Bokeh) even individual pixels can create the effect (which will flicker if the bright pixels flicker). This is less noticeable with Gaussian DoF as it weighs pixels based on distance (and the Gaussian function) so less of the screen is affected which is why it is less noticeable then.