I have dig the source code, and find el-get-bundle use el-get-do-init which
call (el-get-merge-properties-into-status package 'init :noerror t) and init is not member of required-ops from el-get-diagnosis-properties, so it don't call el-get-save-package-status to update :after method. I can not mitigate it by modify el-get custom variables.