That is why it is very impotant to know that only small amount of bitcoin should be used to open a channel and that we should not leave much amount of bitcoin on a channel. Like electrum wallet, it even warns anyone that want to make use of lightning network on electrum wallet to use small amount of bitcoin and indicated it is still under testing. This has not been the first of the vulnerabilities and this may not be the last yet.
Yep, it's important for anyone using the newer and more experimental features in Lightning to understand the potential risks. At the moment, I'd probably advise people only use wumbo with people and services they know and/or trust. Otherwise stick to smaller amounts.
Hopefully they find a solution for this and other attack vectors quickly.
