Still I would like to know how this glitch works and how to prevent it to prevent future problems.
Thanks for letting us know about your experience with your S Pen having multiple issues from glitchy when drawing, freezes for a short time, and sometimes even teleports. Then, it got fixed when you put it back to Samsung Galaxy Tab S7 FE 5G.
If it happens again, you may submit an error report through the Samsung Members app as follows:
Step 1. Long press Samsung Members icon on Apps screen and tap Error reports.
Step 2. Tap OK on agreement popup to send system log data.
Step 3. Select Symptom category "Accessory".
Step 4. Describe the problem in details and SEND.
If the issue persists, you may bring your device to the nearest Samsung Authorized Service Center in your area. Rest assured that your device will undergo an assessment to pinpoint the root cause of the issue. They may guide you and offer solutions to restore it.
or book an appointment with the Samsung Members app as follows:
Support > Book an appointment to set one.
Should you need further assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.
I have sent the error report to Samsung, in hopes for the problem being fixed. Thanks for your suggestion.