hit the buffers

(British)

if a plan or activity hits the buffers, it fails to develop or is stopped

Usage notes: The buffers are two pieces of metal at the end of a railway line that a train will hit if it does not stop.

The talks hit the buffers after only 4 hours.

from free dictionary

from:
Yet managerial capitalism hit the buffers in the late 1970s. Predictable growth turned into stagflation.

Wooldridge, Adrian (2015-04-02). The Great Disruption: How business is coping with turbulent times (p. 13). Profile Books. Kindle Edition.

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