problem with unwanted strikeout in src blocks

[Uwe Brauer <oub@mat.ucm.es>]

Hi



The following code block is nicely displayed

#+begin_src matlab :exports results :eval never-export :results output latex
disp('P(\text{Covid19}|\text{+})&=\frac{P(\text{+}|\text{Covid19})P(\text{Covid19})}{P(\text{+}|\text{Covid19})P(\text{Covid19})+P(\text{+}|\text{No-Covid19})P(\text{No-Covid19})}\\')
#+end_src


However when I wrap a solutionorbox around it (which I need when
exporting to latex) all text between the «+» 
gets a strikeout.


#+begin_solutionorbox
#+begin_src matlab :exports results :eval never-export :results output latex
disp('P(\text{Covid19}|\text{+})&=\frac{P(\text{+}|\text{Covid19})P(\text{Covid19})}{P(\text{+}|\text{Covid19})P(\text{Covid19})+P(\text{+}|\text{No-Covid19})P(\text{No-Covid19})}\\')
#+end_src
#+end_solutionorbox

And idea what to do?

Thanks


Uwe Brauer 


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