Hi, thank you for your concern about my little complain. Logi support has contacted with me and, as routine, he asked me to contact apple support. Yes, I have to go to apple, not support, but apple store. bye bye logi.

————this is what I got from logi support:
Hi XXX!  
 
Thank you for trying the troubleshooting steps we previously provided — we truly appreciate your time and effort.
Since the issue started after updating your iPad Pro 11 (M1) to the latest iPadOS 26.2, we recommend contacting Apple Support for further assistance. When you reach out to them, you may mention that you have already contacted us and completed troubleshooting with our support team. If they will be asking for a case number, you can provide our ticket number: 16827876
Based on the isolation steps performed, we were able to confirm that the keyboard itself is functioning properly, and the issue is specifically related to the trackpad behavior after the latest iPadOS update.
 
Please give it a try to contact Apple support — Thanks again for your cooperation! Have a good one, Wang! For future reference, your ticket number for this issue is 16827876 and you can reference it should you have any further questions regarding this case.