How to disconnect qq space of mobile phone?

With UC browser, you can generally type spaces, if not, you can type characters. My mobile phone used to be like this for a while. I don't know why, but I can't type it when I want to type it. [br/] It seems that if I type, I will directly use the line break in the mobile phone input method. If I modify the log status, I will add [br/] before the new text. Hmm!