Mike NJ

I just returned from my Lexus dealership after the sixth (6th) time reporting the engine/transmission hesitation/jolting actions on my 2018 RX350. Note: I purchased the vehicle "certified used", November 2021. They are now having their area "engineer" come down to personally inspect my vehicle...btw, he's not an "engineer"...just a technician. We clarified that. I have been a loyal and faithful Lexus customer since 2001. Have owned four (4) RX vehicles (2001, 2011, 2015 and now 2018). (We still own the 2011 and 2015). Additionally, I've owned a 2001 IS and currently own a 2016 ES. All purchased, new or used, from the same Lexus dealership. The current 2018 RX 350 problem is the first time that I have encountered any issues with my Lexus vehicles. Note: I have always used high octane fuel (93) in the 2018 RX350. Operation: It doesn't matter if I'm in ECO, Normal or Sport modes. The vehicle hesitates each time I press the accelerator. Then the transmission engages with a forward jolt of the vehicle. Additionally, I've observed the transmission disengaging/engaging with a jolt and clunking sound during highway driving, as well as, just recently having the jolting 3 times in a row while driving at a constant speed of 60 MPH. After the 5th return (complaint) and "transmission module memory reset", I was advised to operate the vehicle in either the ECO or Sport mode, that this would alleviate some of the problem. The vehicle still performed poorly in the ECO mode, but dangerously in the Sport mode. While in the Sport mode I was attempting to enter a highway ramp through traffic when the vehicle hesitated for about 3 to 4 seconds. Fearing a possible accident forthcoming I depressed the accelerator pedal further only to have the transmission engage violently almost having the vehicle flip over. In my opinion, this is a very dangerous situation. Additionally, while leaving my vehicle for service I have been loaned 2021 and 2022 RX350s. They all have the same problem. I'm told by the Lexus service agents, over the last several months, that this has been a known problem since 2016. You would think, with a loyal customer, like me, that they would have advised me of this issue prior to purchasing. It was a known issue. The sales rep should have known and told me about it. He didn't. Also, is it any wonder that Lexus changed their engine and transmission in the 2023 model? Are we current owners stuck with this vehicle? I'll repost when I get my vehicle back after the company "engineer" checks it out. Anyone else experiencing this issue?