ios Questions in the whisper in the wall

[(MOB)x.cl]

Hello, I am a player of ios. I found a problem in the whisper of the series of tasks wall. When the last two giants interact, the player needs to press the attack button for a long time, but the mobile phone screen does not show a button, so I can't continue to operate. After I found the problem, I changed a mobile phone and found the same problem. Please fix it. Thank you.

[(MOB)iPhone4S]

你好，我也遇到了和你同样的问题，如果有解决办法，请告知我，谢谢