R6 + Tamron 28-300mm f/3.5-6.3 Di VC PZD: Sensor IS and lens IS are not able to collaborate.

[BlueFlash]

I have a big problem with my "Canon R6 + Tamron 28-300mm f/3.5-6.3 Di VC PZD". When IS is activated, corners of my photos are blurred. Obviously, lens and sensor are not able to collaborate. Do you have similar expierence, e. g. with another (older) Tamron VC lenses? Do you know about any solution - eg. using only one IS system?Bottom right corner, IS on, 1/320s, F8, 28mmBottom right corner, IS on, 1/320s, F8, 28mm

Note: on the bottom photo, IS is OFF

[March411]

From the link above. Please note the bottom text on the attached table. New firmware version makes the model compatible with Canon EOS R series cameras (*1) and Canon "Mount Adapter EF-EOS R" for general operations(*2).
(*1) Compatible cameras: EOS R / EOS RP / EOS R5 / EOS R6
(*2) Functions used on DSLR cameras

Again, I am simply using the information from Tamron for this specific lens.