I’m reopening this question for now.
I did what I mentioned above, now I destroy and spawn the water mesh each level played, however the problem is exactly the same, which suggest this is caused by the “game time” (needed by the panner node to calculate the position of UVs) and the way it is calculated on the phone.
Something obviously gets off over time and the only way to reset this is to reset the whole map or load another one. I will think about it some more…