could you please tell us the following:
1. Your Windows OS version
2. Your spacedesk Server version
3. Your Android OS version
4. Your spacedesk Client version
5. The model name and company name of your Android stylus pen (best would be an URL to the product page)
Please also check the following in your spacedesk Android App settings:
Main Hamburger Menu > Input Devices > Pen > “Enable Stylus Screen Control” should be set!
Are you connecting by automatic server discovery or are you using the manual IP input?