That looks like perfectly normal barrel distortion that is found with virtually all wide angle security cameras.
The text overlays from the camera are not warped or distorted at all in your snapshot from BI. They would be if
Blue Iris was warping it. Blue Iris only has one dewarping feature anyway, which is for 180 degree fisheye cameras that are ceiling-mounted facing downward. It only affects recording playback, and is obviously not being used here.
While I can't 100% discount the possibility that the camera could have barrel distortion correction built-in to some new firmware, and that it could have been enabled but is not anymore, that is extremely unlikely.
Barrel distortion correction can be built-in to a lens (at significant added expense) but that is simply not done with cheap compact security cameras like this. And it would be basically impossible for a lens to be accidentally modified or damaged in such a way that it introduced this level of barrel distortion without completely destroying the lens.
In conclusion, the camera has always been this way and you just haven't noticed before.