KDE Crashes after deleting any activity

For some reason whenever I delete an activity that I have Plasma crashes. All my applications disappear for a second, sometimes plasma will relaunch, but other times I get a black screen with no dock or menu bar. I’m not sure what information I could provide to help (let me know if you have something in mind). I included an inxi -F. I forgot if that option is fine, if not I can repost my inxi output.

System:    Host: [redacted] Kernel: 5.8.18-1-MANJARO x86_64 bits: 64 Desktop: KDE Plasma 5.20.4 Distro: Manjaro Linux 
Machine:   Type: Laptop System: LENOVO product: 20R1S04100 v: ThinkPad X1 Carbon 7th serial: <superuser/root required> 
           Mobo: LENOVO model: 20R1S04100 v: SDK0J40697 WIN serial: <superuser/root required> UEFI: LENOVO v: N2QET36W(1.30 ) 
           date: 11/09/2020 
Battery:   ID-1: BAT0 charge: 52.0 Wh condition: 52.0/51.0 Wh (102%) 
CPU:       Info: 6-Core model: Intel Core i7-10710U bits: 64 type: MT MCP L2 cache: 12.0 MiB 
           Speed: 700 MHz min/max: 400/4700 MHz Core speeds (MHz): 1: 700 2: 700 3: 700 4: 700 5: 700 6: 700 7: 700 8: 700 
           9: 700 10: 700 11: 700 12: 700 
Graphics:  Device-1: Intel driver: i915 v: kernel 
           Device-2: Chicony Integrated Camera type: USB driver: uvcvideo 
           Display: x11 server: X.Org 1.20.10 driver: modesetting resolution: 1: 1920x1080~60Hz 2: 1920x1080 
           OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa 20.2.3 
Audio:     Device-1: Intel driver: sof-audio-pci 
           Device-2: Microdia NexiGo HD Webcam type: USB driver: snd-usb-audio,uvcvideo 
           Device-3: Kingston HyperX Cloud Flight S type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Device-4: JMTek LLC. USB PnP Audio Device type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Sound Server: ALSA v: k5.8.18-1-MANJARO 
Network:   Device-1: Intel Wireless-AC 9462 driver: iwlwifi 
           IF: wlp0s20f3 state: up mac: 94:e6:f7:06:b8:37 
           Device-2: Intel Ethernet I219-V driver: e1000e 
           IF: enp0s31f6 state: down mac: f8:75:a4:04:77:e1 
           IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A 
           IF-ID-2: virbr0 state: down mac: 52:54:00:09:7a:53 
           IF-ID-3: virbr0-nic state: down mac: 52:54:00:09:7a:53 
Drives:    Local Storage: total: 931.51 GiB used: 309.10 GiB (33.2%) 
           ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 970 EVO 1TB size: 931.51 GiB 
Partition: ID-1: / size: 899.02 GiB used: 308.96 GiB (34.4%) fs: ext4 dev: /dev/nvme0n1p2 
Swap:      ID-1: swap-1 type: partition size: 16.84 GiB used: 123.4 MiB (0.7%) dev: /dev/nvme0n1p3 
Sensors:   System Temperatures: cpu: 60.0 C mobo: N/A 
           Fan Speeds (RPM): cpu: 2909 
Info:      Processes: 336 Uptime: 2d 12h 05m Memory: 15.31 GiB used: 3.65 GiB (23.9%) Shell: Bash inxi: 3.1.08

You should start with a full system update and also change the kernel as the 5.8 is EOL = end of life.

sudo pacman-mirrors -f && sudo pacman -Syyu
then (for example)
sudo mhwd-kernel -i linux59

Or do it from the UI … Pamac and MHWD.

I used the commands you posted and the problem is still persisting.