This happened due to this huge fee, short fee spike and an issue with some LSPs. It's actually a default lightning mechanism and a protective measure implemented in LDK. it's a closure and the sats will become available in the savings balance.
we are investigating this and also collaborating with LSPs to see how this can be avoided in such a LSP relationship.
we will post an update later.
The fee negotiating process between LN implementations is terrible. And that could trigger this nightmare. LN devs should really consider to fix or change this behavior. I know is a protection mechanism in LN protocol, but it doesn't make any sense to get fucked so easily for no reason.
People are paying sats to buy those LSP channels and closing them just like that will have a huge impact in using this kind of nodes and LN in general.
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yes, we also worked hard on this and have quite some measures around fee negotiation to protect users. it eats a lot of resources :) it's also a bit of a balance depending on the channel partners and how "trusted" those are. some implementations are rather strict which does not make sense in a LSP context. this case was even another edge case...
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