[BUG] Half open intervals can sometimes break left right syntax

[mertgoksel]

Description

If i have a large equation with multiple left right() and just [) intervals, when i write sum it automatically tries to input left and right to unnecessary places

To Reproduce

copy paste this

\lim_{n\to \infty}\left( \sum_{i=1}^{n-1}i\mathbb{1}_{[i,i+1 )}(x) + (n-a)\mathbb{1}_{[n,n+1)}(x) \right) = \begin{cases}

\end{cases}

try to write sum in the empty area
the latex becomes like so

\lim_{n\to \infty}\left\left(  \sum_{i=1}^{n-1}i\mathbb{1}_{[i,i+1  \right)}(x) + (n-a)\mathbb{1}_{[n,n+1)}(x) \right) = \begin{cases}
\sum
\end{cases}

which is not of form.

Expected Behavior

It should produce

\lim_{n\to \infty}\left(  \sum_{i=1}^{n-1}i\mathbb{1}_{[i,i+1)}(x) + (n-a)\mathbb{1}_{[n,n+1)}(x) \right) = \begin{cases}
\sum
\end{cases}