Spark 3.1b2 (470) on OS 10.11.6 - Backtick in Text/Keyboard Plugin not working

[francwalter]

Hallo
I have an old MacBook, an OS 10.11.6 and the last Spark I found for it is 3.1b2 (470).
I use Spark often and I love it, I have many Keyboard Shortcuts in use. One of it is a Text fill-in for the Details-Tag here in Github, but unfortunately the Backticks (`) doesnt work, it is replaced with the Tick (´) which doesnt make a code block in MarkDown :-(
Here my "Details":

Github-Details-Text-replacement

<details>
  <summary>ÜBERSCHRIFT</summary>

´´´  <- here should be 3 backticks but Spark puts Ticks only, when the text is filled
IMPORTANT: after closing /summary and /details empty line
´´´ <- here should be as well 3 backticks
</details>

and always I have to replace the Ticks with Backticks so that the code block is working.
I don't know if this can be fixed otherwise, neither if its a bug in my old version, maybe it is working in the 3.3.2?

Thanks for help.
frank.