Robot Framework - Browser Library - can't click or read value inside a details/summary tag

Question

I have the following details/summary tags and I am trying to run automated test to simulate click on the details drop down or just get the value of the <p> tag within

<tvar data-tvar="en_content">
 <details class="wb-details" close="close">
  <summary>Clickable summary</summary>
  <p>test123</p>
 </details>
</tvar>

I've tried the following using Browser Library but none see the 'test123' inside of the <p> tag.
'Click' does not work. It never opens and shows the value in the screenshots.
'Get Text' times out because it cannot find the value or says it doesn't match.

Get Text    xpath=//tvar[@data-tvar="en_content"]/details/p    contains    test123
Get Text    xpath=//tvar[@data-tvar="en_content"]/details      contains    test123
Get Text    xpath=//tvar[@data-tvar="en_content"]              contains    test123

Click    xpath=//tvar[@data-tvar="en_content"]/details/p  
Click    xpath=//tvar[@data-tvar="en_content"]/details
Click    xpath=//tvar[@data-tvar="en_content"]
Click    xpath=//tvar[@data-tvar="en_content"]/details/summary