I've seen other reports on this, I'll get the hard data!
On the subject of FOV and inconsistency, I updated the PUBG calculator a few days ago to correctly support different aspect ratios. The game applies a static multiplier to the FOV based on the aspect ratio, and there is no magic formula for how this is done. I have analyzed a few common and not so common AR's to make it work with those. But other AR's, especially the extremely wide ones, might be different. Here's how the messy scaling looks: