Not even trying to hide it at this point.
On seeing Gakpo run in to score, Taylor's impulse is to blow the whistle. That impulse being to stop Liverpool scoring. Why he has that impulse is up for debate, but it's beyond doubt he has a bias when it comes to Liverpool. His second instinct is to think "shit, how am I going to explain this...I know, I'll tell him to fake an injury".
There's no "mistake" at play here.