Got flickering screen after applying Jun '21 update

(This is a total dejavu, I was going to make the title identical to a thread that already exists from back in March, and I started it…).
I turned on my laptop today and my screen kept flickering. Since I have started using Timeshift a short wile ago, this is the first time I was able to check if the problem could be fixed be rolling back a recent update, and - voila: It could!
I restored my previous system state with Timeshift and the problem is gone.

[ben@paul-mnj ~]$ inxi -Fxxxza
  Kernel: 5.10.41-1-MANJARO x86_64 bits: 64 compiler: gcc 
  v: 11.1.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.10-x86_64 
  root=UUID=02d09efd-0036-4efc-ace1-08d57809dd36 rw quiet 
  apparmor=1 security=apparmor udev.log_priority=3 
  Desktop: KDE Plasma 5.21.5 tk: Qt 5.15.2 wm: kwin_x11 vt: 1 
  dm: SDDM Distro: Manjaro Linux base: Arch Linux 
  Type: Laptop System: TUXEDO product: TUXEDO v: N/A 
  serial: <filter> Chassis: Notebook type: 10 serial: <filter> 
  Mobo: TUXEDO model: N141CU serial: <filter> UEFI: INSYDE 
  v: 1.07.04 date: 08/30/2019 
  ID-1: BAT0 charge: 34.0 Wh (98.6%) 
  condition: 34.5/35.3 Wh (97.6%) volts: 13.1 min: 11.4 
  model: Notebook BAT type: Li-ion serial: <filter> 
  status: Charging 
  Device-1: hidpp_battery_0 
  model: Logitech Wireless Mouse M315/M235 serial: <filter> 
  charge: 100% (should be ignored) rechargeable: yes 
  status: Discharging 
  Info: Quad Core model: Intel Core i7-10510U bits: 64 
  type: MT MCP arch: Kaby Lake note: check family: 6 
  model-id: 8E (142) stepping: C (12) microcode: DE cache: 
  L2: 8 MiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 36812 
  Speed: 700 MHz min/max: 400/4900 MHz Core speeds (MHz): 1: 700 
  2: 700 3: 700 4: 700 5: 701 6: 700 7: 700 8: 699 
  Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
  Type: l1tf status: Not affected 
  Type: mds status: Not affected 
  Type: meltdown status: Not affected 
  Type: spec_store_bypass mitigation: Speculative Store Bypass 
  disabled via prctl and seccomp 
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user 
  pointer sanitization 
  Type: spectre_v2 
  mitigation: Enhanced IBRS, IBPB: conditional, RSB filling 
  Type: srbds mitigation: TSX disabled 
  Type: tsx_async_abort status: Not affected 
  Device-1: Intel UHD Graphics vendor: CLEVO/KAPOK driver: i915 
  v: kernel bus-ID: 00:02.0 chip-ID: 8086:9b41 class-ID: 0300 
  Device-2: Chicony Chicony USB2.0 Camera type: USB 
  driver: uvcvideo bus-ID: 1-7:3 chip-ID: 04f2:b649 class-ID: 0e02 
  Display: x11 server: X.Org 1.20.11 compositor: kwin_x11 driver: 
  loaded: intel unloaded: modesetting alternate: fbdev,vesa 
  display-ID: :0 screens: 1 
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 
  s-size: 508x285mm (20.0x11.2") s-diag: 582mm (22.9") 
  Monitor-1: eDP1 res: 1920x1080 hz: 60 dpi: 157 
  size: 310x170mm (12.2x6.7") diag: 354mm (13.9") 
  OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) 
  v: 4.6 Mesa 21.1.2 direct render: Yes 
  Device-1: Intel Comet Lake PCH-LP cAVS vendor: CLEVO/KAPOK 
  driver: snd_hda_intel v: kernel 
  alternate: snd_soc_skl,snd_sof_pci bus-ID: 00:1f.3 
  chip-ID: 8086:02c8 class-ID: 0403 
  Sound Server-1: ALSA v: k5.10.41-1-MANJARO running: yes 
  Sound Server-2: JACK v: 0.125.0 running: no 
  Sound Server-3: PulseAudio v: 14.2 running: yes 
  Sound Server-4: PipeWire v: 0.3.28 running: yes 
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: CLEVO/KAPOK driver: r8169 v: kernel port: 5000 
  bus-ID: 3b:00.1 chip-ID: 10ec:8168 class-ID: 0200 
  IF: enp59s0f1 state: down mac: <filter> 
  Device-2: Intel Wireless-AC 9260 driver: iwlwifi v: kernel 
  port: 5000 bus-ID: 40:00.0 chip-ID: 8086:2526 class-ID: 0280 
  IF: wlp64s0 state: up mac: <filter> 
  Device-1: Intel Wireless-AC 9260 Bluetooth Adapter type: USB 
  driver: btusb v: 0.8 bus-ID: 1-10:4 chip-ID: 8087:0025 
  class-ID: e001 
  Report: rfkill ID: hci0 rfk-id: 1 state: down 
  bt-service: enabled,running rfk-block: hardware: no 
  software: yes address: see --recommends 
  Local Storage: total: 1.41 TiB used: 395.58 GiB (27.4%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Intel 
  model: SSDPEKNW010T8 size: 953.87 GiB block-size: 
  physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 
  rotation: SSD serial: <filter> rev: 002C temp: 31.9 C 
  scheme: GPT 
  ID-2: /dev/sda maj-min: 8:0 vendor: Crucial 
  model: CT525MX300SSD1 size: 489.05 GiB block-size: 
  physical: 512 B logical: 512 B speed: 6.0 Gb/s rotation: SSD 
  serial: <filter> rev: R060 scheme: GPT 
  ID-1: / raw-size: 300 GiB size: 294.23 GiB (98.08%) 
  used: 17.61 GiB (6.0%) fs: ext4 dev: /dev/nvme0n1p1 
  maj-min: 259:1 
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%) 
  used: 296 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p3 maj-min: 259:3 
  ID-3: /home raw-size: 553.57 GiB size: 543.81 GiB (98.24%) 
  used: 128.05 GiB (23.5%) fs: ext4 dev: /dev/nvme0n1p4 
  maj-min: 259:4 
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default) 
  ID-1: swap-1 type: partition size: 8 GiB used: 0 KiB (0.0%) 
  priority: -2 dev: /dev/nvme0n1p2 maj-min: 259:2 
  System Temperatures: cpu: 46.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
  Processes: 254 Uptime: 1h 20m wakeups: 5 Memory: 31.06 GiB 
  used: 4.24 GiB (13.6%) Init: systemd v: 247 tool: systemctl 
  Compilers: gcc: 11.1.0 Packages: 1387 pacman: 1381 lib: 380 
  flatpak: 6 Shell: Bash v: 5.1.8 running-in: konsole inxi: 3.3.04 

It’s just that I don’t know how to proceed from here - I can hardly refrain from ever updating my system again. What to do now?

I had the same problem after a previous update. After another restart, the flicker was gone.