Unfortunately, a big bug is still unsolved as of yet.
The serious bug that I want to tell you is hard for me to explain.

If one of you are Thai, you can understand it easily:
1. Type กขคง
(it will be underlined with prediction)
2. Press one space bar
3. Press one backspace
4. Type ก
We get กขคงกขคงก as a result !!!!, instead of กขคงก.
For one who is not familiar with Thai alphabets.
Suppose that กขคง equals abcd.
1. Type abcd
(it will be underlined with prediction)
2. Press one space bar
3. Press one backspace
4. Type a
We get abcdabcda as a result !!!!, instead of abcda.
I think it is caused by the prediction in Thai that there is no way to turn it off
but still on when switch to English.
TESTED ON TWO DELL STREAKS
Can someone get what I'm saying?
So, please fix this big bug. It really slows down my typing.