What is the one campaign you wish you never paused

Hi guys,
Everyone has one. A campaign you paused for a reason that seemed logical at the time. Then when you restarted nothing ever worked the same.Mine was a Google search campaign that had been running for 8 months. Client asked to pause for a product revamp. 6 weeks pause. Could never get back to previous performance.The algorithm had forgotten everything. Took another 4 months to get close.
What campaign do you regret pausing?

I paused a winning Facebook ad for just two weeks when we ran out of stock. When I turned it back on, the algorithm completely forgot who my buyers were.

I paused a steady retargeting ad for a month, and the costs tripled when I turned it back on. The pixel completely lost its recent data momentum.

Had a YouTube ads campaign like this, once paused it lost all momentum and never recovered properly.

Paused a high ROAS retargeting campaign thinking it will be easy to switch back… but performance dropped hard and never fully bounced back.