At first glance it sounds serious but it seems to be a bug in btcd and not a taproot bug
This is likely the transaction that caused problems for the nodes https://mempool.space/tx/7393096d97bfee8660f4100ffd61874d62f9a65de9fb6acf740c4c386990ef73
Its a 998-of-999 tapscript multisig https://twitter.com/brqgoo/status/1579216353780957185
Correct, it's not a bug in taproot, it's a bug in LND. CLN is unaffected https://twitter.com/Core_LN/status/1579258808161153025
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