Create an empty document by deleting everything. Enable Input method (e.g. Ibus Chinese Cantonese). Start typing, e.g. "jung" (select "中") then "gwok" (select "國"). The second character will overwrite the first, leaving just "國" instead of "中國".

Observed using chromium and firefox on Ubuntu. Happens with the following ibus input methods: Chinese cantonese, Chinese Pinyin, Korean, Malayalam swanalekha, Hindi inscript. Does not seem to happen with Kannada inscript.

Version: unspecified
Severity: normal