Hello everyone
As long as all indicators (Isofix and base) are green, slight lateral wobbling is not a problem. This can happen because every car seat is cut differently (for example, in sporty seats the seat surface is not flat). You can try to shorten the base slightly to provide more contact area from the base to the car seat (the indicator of the base must still be green). If you have any doubts, feel free to send us a video of the installed seat via our social media channels and we will take a look.
Kind regards, Claudia from the Joie Baby Switzerland Team

Unfortunately, it's also a bit wobbly here.