Plank-errors in Syslog

I keep getting errors like these every second or so:

Dec 2 16:26:59 eric-B450-AORUS-M plank.desktop[6386]: ###!!! [Parent][DispatchAsyncMessage] <mark>Error</mark>: PClientManager::Msg_ForgetFutureClientSource Processing <mark>error</mark>: message was deserialized, but the handler returned false (indicating failure)

Does anyone know what is going on?

I have a 3 screen setup and I have seen that plank fails with 3 screens, see for instance Does the error above have anything to do with this?

My graphics setup is as follows:

$ sudo lshw -class display
       description: VGA compatible controller
       product: Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:08:00.0
       version: ca
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=amdgpu latency=0
       resources: irq:76 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fe500000-fe57ffff memory:c0000-dffff