https://smile.amazon.com/MoKo-Samsu...4?keywords=Tab+s6+cases&qid=1573242713&sr=8-4
This is one i mentioned above... I just remove the case when I need to take notes. I love the easy on and off of the magnetic case.
Here s the thread with the issue. https://forums.androidcentral.com/samsung-galaxy-tab-s6/981306-s-pen-issues.html#post6675270