Gear problems

Hello Community , have a Volvo V90 bj 2023 automatic with 127k kilometers . For 2 days I have got a transmission problem . The car switches as soon as you get a little faster starting drive into the gear emergency run . When driving it makes itself noticeable that the speed increases but the car does not really accelerate . After everyone gets out of the error message . However, after fast driving comes back . If you drive reasonably calmly the error message does not come . The car was today at Freundli According to Tacho, a 10km long test drive was done where you could not find out what I can’t believe.Now I have the car again and the same problem occurs. Gear oil was changed 14 days ago at the friendly one and was also checked today. I have the feeling that between switching from the 3rd in the 4th gear the problem exists. Did anyone have a similar problem?