That could be linked to electrolyte balance. Depending on your water source, if it's too low in minerals it can flush out your system causing something like hyp

That could be linked to electrolyte balance. Depending on your water source, if it's too low in minerals it can flush out your system causing something like hyponatremia (low sodium), which can cause sleep issues. I had similar problems when I used a Brita filter with a ketogenic diet, switching back to regular tap water fixed it. :)