Problem with Deferred Rendering and HDR on iOS with 2017.2/2017.3

Hello. There is a problem with rendering on iOS Devices. When I turn on HDR(R11G11B10) on Deferred Rendering then artefacts like on the screenshot appear on device, but then I switch rendering mode to Forward or disable HDR then problem disappears. Tested on clean project, iPhone 7 and Unity 2017.2.1p1/Unity 2017.3.0p1. How it can be fixed? Thanks.

@Reedmand Same thing still happens in 2018.1.1f, I’m trying to find a solution…