Graphics glitches after upgrade to mesa 20.3 on Khadas VIM3 Pro (Mali G52 GPU)

Hello, I run a Khadas VIM3 Pro ARM based SBC on a Mali G52 GPU. I recently upgraded to mesa 20.3.3-1 as part of a regular update of my Manjaro KDE Linux. Did not notice any graphics problems before then (I think I was using 20.2.6 before that?). Since upgrading, there are a bunch of missing letters from the startup menu, and windows as well as panels/various parts of the desktop flicker on and off, which is severely affecting usability (it is difficult to screen capture the flickering as it only lasts for fractions of a second, but it's really distracting). I discussed this with the Manjaro developers, and concluded it is a graphics driver issue, so I'm trying my luck here.

System information

System:    Host: neurofire Kernel: 5.10.5-1-MANJARO-ARM aarch64 bits: 64 compiler: gcc v: 10.2.0 Desktop: KDE Plasma 5.20.5 
           tk: Qt 5.15.2 wm: kwin_x11 dm: SDDM Distro: Manjaro ARM 
CPU:       Info: 6-Core (2-Die) model: N/A variant-1: cortex-a53 variant-2: cortex-a73 bits: 64 type: MCP MCM arch: ARMv8 
           rev: 4 
           features: Use -f option to see features bogomips: 0 
           Speed: 2208 MHz min/max: 100/1800:2208 MHz Core speeds (MHz): 1: 1800 2: 1800 3: 2208 4: 2208 5: 2208 6: 2208 
Graphics:  Device-1: meson-g12a-mali driver: panfrost v: kernel bus ID: N/A chip ID: amlogic:ffe40000 
           Device-2: meson-g12a-dw-hdmi driver: meson_dw_hdmi v: N/A bus ID: N/A chip ID: amlogic:ff600000 
           Display: x11 server: X.org 1.20.10 compositor: kwin_x11 driver: modesetting alternate: fbdev 
           resolution: <xdpyinfo missing> 
           OpenGL: renderer: Mali G52 (Panfrost) v: 2.1 Mesa 20.3.3 direct render: Yes 

Also, dmesg on startup:

Log files as attachment

• Output of dmesg
• Backtrace
• Gpu hang details

dmesg2 glxinfo

Screenshots/video files (if applicable)

I hope this is sufficient information, I'd really appreciate any help with this