Lighting Bug. Clipping?

I’m running into in issue with light objects where after a certain radius (roughly 100) they start to clip. It looks almost like the “sphere” the point light forms is getting cut in half slightly off center.

Then other lights such as spot lights have a similar effect.

This was happening in 4.15.1, and I just did a fresh build of Unreal this morning from the latest source (now 4.15.2), and it’s also present here.
The clipping effect unfortunately isn’t limited to the viewport; it happens in the final build too.

I’m using Linux, with an AMD gpu.

Any suggestions?