Just saw this exploded cop car driving around after sending not-glados back to delamain. Also had a whole cool car chase followed by a bike crash when taking that one cab slowly back to del though and another took me past the the car I'm driving so huge improvements overall.
There's a known bug (fixed in the upcoming patch) that sometimes shows controller input symbols when playing on M/K. The keys still work, but the displayed icon is wrong.
Not sure if this is the same thing you're experiencing.