I think more and more it’s a “buggy” ibwidevinecdm.so.
Here you can download a “4.10.1679.0” and the “4.10.2252.0” version:
Just stop media playback in kodi and replace the file
You can rename the old one or just overwrite. Then do reboot once and inputstream.helper addon should show you the old or new version number.
Then try again with the “4.10.1679.0” lib, thank you. Do not choose update Widevine on playback start, just cancel and try watching.
This should be shown on the “4.10.1679.0” version: