The Fireblocks Blog published material about a situation where one stuck transaction halts processing of all subsequent operations. In the publication this is described as a structural property of blockchain networks like Ethereum.

The authors link the halt of a digital asset operation not to a failure of the entire blockchain, but to the blocking of a single transaction in the queue. Due to the limited scope of available materials, it is not possible to determine which tools or procedures Fireblocks offers.

For operators this means a potential vulnerability not of an individual transaction, but of the entire sequence of operations. This is a conclusion from the provided synopsis, not a confirmed source of additional implications or the scale of the problem.