framework not copied when set pod binary from false to true

[aelam]

set

pod 'AFNetworking', :binary => false    

pod install I can see the source in pod target

then I change to

pod 'AFNetworking', :binary => true

the framework is not copied to pod target, just README and license

$ pod env | egrep 'CocoaPods |Xcode|cocoapods-binary' CocoaPods : 1.7.0 Xcode : 10.2 (10E125) cocoapods-binary : 0.4.4 plugin 'cocoapods-binary'