Reduction in graphics
There seems to be quite a drop in graphics today. I'm on OnePlus 5T running Android 9, but I know numerous people on other phones complained about the same thing. Some have Huaweis, Pixels, Xperias. Seem to all be on androids, not sure about other OS.
The screenshot shows the pixelated shadows in encounters, though the colours on the map seem to be somewhat washed off as well.
Doesn't look like it's a phone issue as it would be much more an isolated thing rather than happen to a whole bunch of people at the same time. Not likely connected to the update either because I'm still on 2.11, but someone said they updated to 2.12 hoping it'll fix and it didn't.