Vicky M it is NOT a problem with a single user that you played with. I have had this problem in past with more than one users. You can check my thread.
I have that problem too. And it cause losses for me. I think maybe it is the internet connection is the problem. But if you are sure that it is not the internet connection problems, do not hesitate to send a feedback to SoloLearn. And they will look what is the problem.
There is a guy in the sololearn that is hacking or patching the game play, everytime I challenge him, it says sth went wrong while I can challenge other at the same time, can u guyz report him or sth... HIS name is Mukhtar Mahamed