I have some errors using my tamron 35mm 1,4 ef mount lens on my canon r6 mark ii body that i never encountered on my 5d mark iii and 5d mark iv body!

1. some settings like lens corrections and lens stabilizer are all locked and i cant change anything (on/or off).
2. sometikes when taking stills the camera slows down to write even one image and the red light on the body flashes for so long ( over 10 secs) until i can take another photo and sometimes the photo is not written at all (i use kingston's canvas v90 64gb cards).
3. the camera randomly has focus issues and the diaphragm of the lens sounds weird and the liveview mode doesnt show correct exposure , then i have 01 error communicaton problem pop up and i have to take off the battery because the camera dont turn off otherwise.

Those are the main 3 things i noticed last month!!! does anyone knows what is going on? i have also used some canon ef lenses and i did not noticed anything like these yet!!!