diff --git a/internal/pipewire/core.go b/internal/pipewire/core.go
index 4642bdb..6a8af0b 100644
--- a/internal/pipewire/core.go
+++ b/internal/pipewire/core.go
@@ -3,6 +3,8 @@ package pipewire
 import (
 	"errors"
 	"fmt"
+	"maps"
+	"slices"
 	"strconv"
 	"time"
 )
@@ -373,6 +375,10 @@ func (core *Core) Sync() error {
 		}
 	}
 
+	if len(core.ctx.pendingIds) != 0 {
+		core.ctx.closeReceivedFiles()
+		return &ProxyFatalError{Err: UnacknowledgedProxyError(slices.Collect(maps.Keys(core.ctx.pendingIds))), ProxyErrs: core.ctx.cloneAsProxyErrors()}
+	}
 	return core.ctx.doSyncComplete()
 }
 
diff --git a/internal/pipewire/pipewire.go b/internal/pipewire/pipewire.go
index 06f7fc6..907f854 100644
--- a/internal/pipewire/pipewire.go
+++ b/internal/pipewire/pipewire.go
@@ -18,7 +18,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"maps"
 	"os"
 	"runtime"
 	"slices"
@@ -601,13 +600,6 @@ func (ctx *Context) roundtrip() (err error) {
 			err = &ProxyFatalError{Err: danglingFiles, ProxyErrs: ctx.cloneAsProxyErrors()}
 			return
 		}
-
-		// this check must happen after everything else passes
-		if len(ctx.pendingIds) != 0 {
-			ctx.closeReceivedFiles()
-			err = &ProxyFatalError{Err: UnacknowledgedProxyError(slices.Collect(maps.Keys(ctx.pendingIds))), ProxyErrs: ctx.cloneAsProxyErrors()}
-			return
-		}
 	}()
 
 	var remaining []byte