electrum's been stolen a few times. the litecoin version isn't endorsed by them either.
As it says in their statement:
We have never enforced our trademark against altcoin versions of
Electrum (such as Litecoin, etc), because we consider that users of
these altcoins are well aware of the distinction between Bitcoin and
their coin, and that they cannot be harmed by that confusion. However,
we do not agree with the use of the Electrum name in the context of a
Bitcoin fork, because it suggests that we endorse that fork, and that
we also endorse that wallet.
It's plain disrespectful for "Electrum Cash" to know about Electrum's objection and choose to still push the boundaries with "Electron Cash" instead of just admitting to being a new wallet.