Multiple applications crashed and dumped core

I get these coredumps:

dic 31 17:44:17 manjaro systemd-coredump[26181]: Process 627 (Xorg) of user 0 dumped core.
░░ Subject: Process 627 (Xorg) dumped core
░░ Process 627 (Xorg) crashed and dumped core.
dic 31 17:44:24 manjaro systemd-coredump[26277]: Process 1660 (akonadiserver) of user 1000 dumped core.
░░ Subject: Process 1660 (akonadiserver) dumped core
░░ Process 1660 (akonadiserver) crashed and dumped core.
dic 31 17:44:53 manjaro systemd-coredump[27387]: Process 26231 (Xorg) of user 0 dumped core.
░░ Subject: Process 26231 (Xorg) dumped core
░░ Process 26231 (Xorg) crashed and dumped core.
dic 31 17:44:55 manjaro systemd-coredump[27440]: Process 26348 (kwin_x11) of user 1000 dumped core.
░░ Subject: Process 26348 (kwin_x11) dumped core
░░ Process 26348 (kwin_x11) crashed and dumped core.

I think this is a bug in xorg-server, as yet unfixed.

And here are the Arch discussion and bug report.