Cannot input any 'char' into a SEditableText

When i exchange English IME to Chinese IME using ‘Shift’ key,sometimes,I cannot input any ‘char’ into a SEditableText! Or,Chinese Word insert into the front of the text in the SEditableText.

When i use Chinese IME,if I delete all the words in the SEditableText using ‘Backspace’,I cannot input any ‘char’ into a SEditableText.

As I am Chinese,I hope some Chinese fellow can answer my question, so I repeat the question using Chinese.

两种情况:
第一种,就是在输入到SEditableText中,我从英文输入法切换到中文输入法用Shift切换,有一定几率触发,什么也输入不进去的情况,重新用鼠标点一下,要么就是中文会添加到文字的前面(这个很烦)

第二种,就是当你是中文输入法,你用Backspace删除SEditableText中所有的字符之后,我也什么都输入不进去的情况

Which IME are you using? I do recall an issue like this, do you know if it still happens in 4.17?

Microsoft Default IME(WIN10),I test in 4.17,It’s fixed!