So far I’ve been looking at the viewport only.
For the cascade sample scene the preview temperatures were indeed different from one grid to the other which explains what I saw.
For my own test scene though, I checked and the preview temperatures and all the other settings were the same for both grids (except for the xyz grid size).
I moved the 1st grid so that there was more overlap between the two grids and now the liquid transfers properly to the second grid.
Now that the fluid passes to the 2nd grid correctly I noticed a sharp edge created (in the render) as the fluid in grid 2 appears on the geometry of the fluid from grid 1.
I checked and it’s the same on the cascade sample scene render too. (see image)
