UPDATE. Now, at 58k pump continued to work fine despite the fact that I was getting error codes all the time:
2E84,4,Electric coolant pump, communication
2E81,1,Electrical coolant pump, speed deviation.
I decided to replace pump and thermostat ($450) any way. I did it on 8” ramp. It took me about 3h and it was fairly easy to do. I am very thankful for this diy: