This drove me nuts recently. In my case, it wasn't recognising my profile and kept logging me in as a guest. It didn't matter how many times I entered my password into the car, it kept forgetting me and chucking up the terms and conditions screen at start up. I then reset my password in the Lexus Link+ app, entered the new password into Cordelia and it's now sweetness and light again. For how long though, I can't predict. There is only one thing I do not like about Cordelia and that is how shockingly bad the IT side of things is. When it works, it's ok. When it doesn't - and it seems to chuck its toys out of the pram every couple of months or so, it's a right pain in the backside.
Mincey's post in LBX asks to accept terms and conditions on every start. was marked as the answer