It was about a month past that Google Pixel owners began reporting problems with all the camera. During the time, it was in regards to lens flare effect or an aura that would seem in some images. Luckily, Google was alert to the problem and had a fix on the road.
The brand new problem was initially reported on the Google Product Forums. Also it seems that some users are experiencing a freezing dilemma preceded by peculiar pink / purple distortions when using the camera. The issue is not just isolated to the default camera program, but also extends to other third-party programs that utilise the camera. Unfortunately, the issue hasn't been resolved, and Google has yet to give a firm response on what's the reason for the problem.