Lightroom/Camera Raw: SONY FE Samyang AF 24mm F2.8 Lens Profile Distortion Control Incorrect

The Amount Slider is normally set to 100% of distortion correction. You may want to try adjusting the slider to find the sweet spot for your lens. It is provided for the purpose of increasing or decreasing the profile distortion.

I spoke to the Camera Raw engineer in charge of Lens Profiles and we've opened an issue to review this profile. Thanks for reporting it. 

Rikk, on my system with LR 8.2.1 it's showing as 'Built-in Lens Profile applied.' I don't see that in the OP's screenshot. If that's correct then there should be no need to check 'Enable Profile Corrections,' which would double-apply profile corrections. With it unchecked it appears Distortion a correction is applied, but no Vignetting correction. Using RawDigger the file appears to have very little distortion and it does not apply profile corrections.  Something's not right with the built-in lens profile or it isn't actually being applied in-camera (bogus detection).

UPDATE: Just checked the lens profile info (i) and it's only applying chromatic aberration correction. The lens profile does need to be enabled so clearly is incorrect.