--sync: Do not start TUI until initial filtering is complete

src/core.go

@@ -247,7 +247,7 @@ func Run(opts *Options) (int, error) {
 	if heightUnknown {
 		maxFit, padHeight = terminal.MaxFitAndPad()
 	}
-	deferred := opts.Select1 || opts.Exit0
+	deferred := opts.Select1 || opts.Exit0 || opts.Sync
 	go terminal.Loop()
 	if !deferred && !heightUnknown {
 		// Start right away