Environment

• TeXstudio: 2.12.14
• Qt: 5.8.0
• OS: Win10, 1803 (17134.523)
• TeX distribution: texlive

Expected behavior

Let | denote the caret.
Type (|), and then (\cite{|). Then ) is not matching {, and it is colored red. That's fine.

As you type \cite{, a menu pops up. When you select an entry from the popup menu,
(\cite{|) should be like (\cite{anything}) and nothing is colored red.

Actual behavior

) is still colored red (background color red).

How to reproduce

As in the "Expected behavior".