I need help with Waveshare 3,5" touchscreen

Hi everyone, I`m new in the forum an like to ask for help.
I installed a fresh Volumio 4.119 on a Pi3B with a Waveshare 3,5" touchscreen.
The screen seems to work during boot process as seen in the picture below.

But when the touch plugin is activating i only see a blinking cursor in the upper left corner of the display and then just a black screen. The touchsreen seems to responding to my fingers when i randomly touch it i was able to change the radiostations. I tried install an reinstall different versions of the touch plugin with no luck an now i cant get any further.
I think the problem is only the right enty in the right config file.
When the plugin is deactivated i see the login srenn for tty1 on the display

with kind regards Matze


when the plugin is deactivated i see the login screen for tty1 on the display.


this is the 3,5" display i use

Take a look here: