Steps to reproduce:

1. Create a page with the following markup containing multiple text formatting:

   -*test*-
   test
   
   _*test*_
   test
   
   +*test*+
   test
   
   *-test-*
   test
   
   *_test_*
   test
   
   *+test+*
   test
   
   +-test-+
   test
   
   +_test_+
   test
   
   -+test+-
   test
   
   _+test+_
   test
   

2. Save the page - page will be rendered correctly
3. Export the page to PDF - there is some formatting problems. Please refer to screenshot [^output.jpg]. The 4th and 10th test shows that the formatting being applied to the whole paragraph.