Bug: LaTeX inline maths expression \(+\) wrongly toggles strike-through face

[Firmin Martin]

Consider the following lines: 
- $+$ foobar $+$
- \[+\] foobar \[+\]
- $$+$$ foobar $$+$$
- \(+\) foobar \(+\)
Each of them is correct LaTeX inline/display maths expressions, but only the
  last one toggles strike-through face when it shouldn't. 

Emacs  : GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, 
cairo version 1.16.0)
 of 2020-10-16
Package: Org mode version 9.4 (9.4-53-gc97446-elpa)

Best,

Firmin Martin