diff --git a/docs/changelog.rst b/docs/changelog.rst
index 98f8fca8e..17d671d10 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -205,6 +205,8 @@ Detailed list of changes
 
 - Sessions: Also save/restore layouts other than the currently active layout (:pull:`10324`)
 
+- Wayland: Fix clipboard sharing between kitty instances in containers with isolated PID namespaces (:iss:`10352`)
+
 
 0.48.2 [2026-07-30]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/glfw/wl_window.c b/glfw/wl_window.c
index 30d161978..cc1074ba7 100644
--- a/glfw/wl_window.c
+++ b/glfw/wl_window.c
@@ -440,8 +440,8 @@ _glfwWaylandAfterBufferSwap(_GLFWwindow *window) {
 
 static const char *
 clipboard_mime(void) {
-    static char buf[128] = {0};
-    if (buf[0] == 0) { snprintf(buf, sizeof(buf), "application/glfw+clipboard-%d", getpid()); }
+    static char buf[256] = {0};
+    if (buf[0] == 0) { snprintf(buf, sizeof(buf), "application/glfw+clipboard-%d-%lld", getpid(), (long long)monotonic_start_time); }
     return buf;
 }