Error after unlock and slowness in return

This error is printed in the journalctl after unlocking the screen.

PS: I'm using dual monitor

Jul 12 22:08:35 systemd[18451]: Failed to start Portal service (GTK+/GNOME implementation).
Jul 12 22:09:00 systemd[18451]: Failed to start Portal service.
Jul 12 22:09:00 systemd-coredump[18656]: Process 18490 (xdg-desktop-por) of user 620 dumped core.

                                         Stack trace of thread 18490:
                                         #0  0x00005624668d8a3b n/a (xdg-desktop-portal)
                                         #1  0x00005624668d8b14 n/a (xdg-desktop-portal)
                                         #2  0x00007febddd265e7 n/a (libgio-2.0.so.0)
                                         #3  0x00007febddce8204 n/a (libgio-2.0.so.0)
                                         #4  0x00007febddce8d07 n/a (libgio-2.0.so.0)
                                         #5  0x00007febddd18a03 n/a (libgio-2.0.so.0)
                                         #6  0x00007febddce8204 n/a (libgio-2.0.so.0)
                                         #7  0x00007febddce8239 n/a (libgio-2.0.so.0)
                                         #8  0x00007febdd73d1d6 g_main_context_dispatch (libglib-2.0.so.0)
                                         #9  0x00007febdd73d5b1 n/a (libglib-2.0.so.0)
                                         #10 0x00007febdd73d8e2 g_main_loop_run (libglib-2.0.so.0)
                                         #11 0x00005624668d82ce n/a (xdg-desktop-portal)
                                         #12 0x00007febdcf0a06b __libc_start_main (libc.so.6)
                                         #13 0x00005624668d86ba n/a (xdg-desktop-portal)

                                         Stack trace of thread 18491:
                                         #0  0x00007febdcfd4ea9 __poll (libc.so.6)
                                         #1  0x00007febdd73d523 n/a (libglib-2.0.so.0)
                                         #2  0x00007febdd73d63e g_main_context_iteration (libglib-2.0.so.0)
                                         #3  0x00007febdd73d692 n/a (libglib-2.0.so.0)
                                         #4  0x00007febdd765a2a n/a (libglib-2.0.so.0)
                                         #5  0x00007febdd2aa075 start_thread (libpthread.so.0)
                                         #6  0x00007febdcfdf53f __clone (libc.so.6)

                                         Stack trace of thread 18507:
                                         #0  0x00007febdcfd4ea9 __poll (libc.so.6)
                                         #1  0x00007febdd73d523 n/a (libglib-2.0.so.0)
                                         #2  0x00007febdd73d63e g_main_context_iteration (libglib-2.0.so.0)
                                         #3  0x00007febd880ef4e n/a (libdconfsettings.so)
                                         #4  0x00007febdd765a2a n/a (libglib-2.0.so.0)
                                         #5  0x00007febdd2aa075 start_thread (libpthread.so.0)
                                         #6  0x00007febdcfdf53f __clone (libc.so.6)

                                         Stack trace of thread 18492:
                                         #0  0x00007febdd711303 g_pointer_bit_lock (libglib-2.0.so.0)
                                         #1  0x00007febdd71f278 g_datalist_id_set_data_full (libglib-2.0.so.0)
                                         #2  0x00007febdda1ca95 g_object_unref (libgobject-2.0.so.0)
                                         #3  0x00007febdd739af3 n/a (libglib-2.0.so.0)
                                         #4  0x00007febdd73a57e n/a (libglib-2.0.so.0)
                                         #5  0x00007febdd73d260 g_main_context_dispatch (libglib-2.0.so.0)
                                         #6  0x00007febdd73d5b1 n/a (libglib-2.0.so.0)
                                         #7  0x00007febdd73d8e2 g_main_loop_run (libglib-2.0.so.0)
                                         #8  0x00007febddd2c348 n/a (libgio-2.0.so.0)
                                         #9  0x00007febdd765a2a n/a (libglib-2.0.so.0)
                                         #10 0x00007febdd2aa075 start_thread (libpthread.so.0)
                                         #11 0x00007febdcfdf53f __clone (libc.so.6)

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elementary / greeter

Error after unlock and slowness in return #143