I am trying to setup a Timelapse sequence which pans from left to right.

According to the tutorials you adjust the crop in the keyframes and then use the auto-transition to 'animate' from one to the next.

I have done this now, 3 times, and LRT is not picking it up after the LR editing.

Can anyone help on this one please. I am following the workflow as I understand it, making the edits to the keyframes, saving the metadata and reloading in LRT. When I reload, the edits on cropping have been lost on the first set, but asre still there in the 2nd set, which makes it even more concerning.

Can you please help.

Please make sure to exactly follow the workflow with initializing etc... that normally will get you going.