I was recently reading Blake Ostler, who is my go-to guy on theology - and he argued that it looks as if the term Jehovah, or God in the Old Testament, is not used with consistency. It usually refers to Jesus Christ, in his pre-incarnate form, but not always - sometimes God refers to God the Father. And sometimes this cannot be clearly established.
All of which suggests the matter of distinguishing whether the Father or Son is referenced is not always important.
This is supported by the data cited in FAIR Mormon
SO - despite what I stated here
It seems that the name Jehovah is not always referring to Jesus, but sometimes and often, it is.
I am pleased about this, it is something of a relief - because sometimes a strictly 100% identification of Jehovah with Jesus - which I thought was theologically insisted upon - did seem forced.