I need to build 348 1:1previews, but the previews stop building at 153.
Never before such a behavior. ???
Please update the Lightroom software to its latest update and check if that helps.
refer: Keep your Lightroom version up to date
I too have the same problem - was there ever a solution to this?
I'm running the latest available version of Lightroom, on Creative Cloud.
Retrieving data ...