diff --git a/internal/api/room/upload.go b/internal/api/room/upload.go
index bba7b989..046c6d94 100644
--- a/internal/api/room/upload.go
+++ b/internal/api/room/upload.go
@@ -95,15 +95,13 @@ func (h *RoomHandler) uploadDialogPost(w http.ResponseWriter, r *http.Request) e
 	//nolint
 	defer r.MultipartForm.RemoveAll()
 
-	if !h.desktop.IsFileChooserDialogOpened() {
-		return utils.HttpUnprocessableEntity("file chooser dialog is not open")
-	}
-
 	req_files := r.MultipartForm.File["files"]
 	if len(req_files) == 0 {
-		return utils.HttpInternalServerError().
-			WithInternalErr(err).
-			WithInternalMsg("unable to copy uploaded file to destination file")
+		return utils.HttpBadRequest("no files received")
+	}
+
+	if !h.desktop.IsFileChooserDialogOpened() {
+		return utils.HttpUnprocessableEntity("file chooser dialog is not open")
 	}
 
 	dir, err := os.MkdirTemp("", "neko-dialog-*")
diff --git a/internal/webrtc/peer.go b/internal/webrtc/peer.go
index 590b598e..5d0ae2a9 100644
--- a/internal/webrtc/peer.go
+++ b/internal/webrtc/peer.go
@@ -109,7 +109,13 @@ func (peer *WebRTCPeerCtx) Destroy() {
 	peer.mu.Lock()
 	defer peer.mu.Unlock()
 
-	err := peer.connection.Close()
+	var err error
+
+	// if peer connection is not closed, close it
+	if peer.connection.ConnectionState() != webrtc.PeerConnectionStateClosed {
+		err = peer.connection.Close()
+	}
+
 	peer.logger.Err(err).Msg("peer connection destroyed")
 }
 
diff --git a/internal/websocket/manager.go b/internal/websocket/manager.go
index 5ad9a0f8..03da86b2 100644
--- a/internal/websocket/manager.go
+++ b/internal/websocket/manager.go
@@ -2,6 +2,7 @@ package websocket
 
 import (
 	"encoding/json"
+	"errors"
 	"net/http"
 	"sync"
 	"time"
@@ -253,19 +254,26 @@ func (manager *WebSocketManagerCtx) connect(connection *websocket.Conn, r *http.
 		Str("agent", r.UserAgent()).
 		Msg("connection ended")
 
+	if err == nil {
+		logger.Debug().Msg("websocket close")
+		session.DisconnectWebSocketPeer(peer, false)
+		return
+	}
+
 	delayedDisconnect := false
 
 	e, ok := err.(*websocket.CloseError)
 	if !ok {
-		logger.Err(err).Msg("read message error")
+		err = errors.Unwrap(err) // unwrap if possible
+		logger.Warn().Err(err).Msg("read message error")
 		// client is expected to reconnect soon
 		delayedDisconnect = true
 	} else {
 		switch e.Code {
 		case websocket.CloseNormalClosure:
-			logger.Info().Str("reason", e.Text).Msg("websocket close")
+			logger.Debug().Str("reason", e.Text).Msg("websocket close")
 		case websocket.CloseGoingAway:
-			logger.Info().Str("reason", "going away").Msg("websocket close")
+			logger.Debug().Str("reason", "going away").Msg("websocket close")
 		default:
 			logger.Warn().Err(err).Msg("websocket close")
 			// abnormal websocket closure:
diff --git a/internal/websocket/peer.go b/internal/websocket/peer.go
index 203caa83..8722acb6 100644
--- a/internal/websocket/peer.go
+++ b/internal/websocket/peer.go
@@ -2,6 +2,7 @@ package websocket
 
 import (
 	"encoding/json"
+	"errors"
 	"sync"
 
 	"github.com/gorilla/websocket"
@@ -42,7 +43,8 @@ func (peer *WebSocketPeerCtx) Send(event string, payload any) {
 	})
 
 	if err != nil {
-		peer.logger.Err(err).Str("event", event).Msg("send message error")
+		err = errors.Unwrap(err) // unwrap if possible
+		peer.logger.Warn().Err(err).Str("event", event).Msg("send message error")
 		return
 	}