Hi,
Thank you for all the details, it helps us a lot!
You have discovered a code bug, as the plugin should have respected the default content length (130 characters +/- word endings). Since you added back-end access, I used the code editor to apply a minor fix directly to the plugin code to respect the description length values. Now it should be all right.
Now, you can adjust the length of that field here: https://i.imgur.com/dKuqe1E.png
