Pinebook Pro Boot Issues - Booting needs multiple attempts

[mtndew]

Sounds damn annoying
Since you are using manjaro, mostly don't boot, use sleep
Sleep is a lot faster too, ~10-12s for desktop restore, another 10-12s for wifi
Manjaro is one of the 4 distros where sleep works properly (7%/day)
(Elementary is another)
In systemsettings5, under power, you can set it up, for example if
lid switch is bad, to ignore it and pwr button to ask or sleep
have you looked in dmesg for error or fail?
If you have a serial cable, you probably could troubleshoot  it

I have been using sleep and it hasn't let me down yet.

Running dmesg after boot gives the below output. It seems there is a issue with the firmware which I have always suspected. Is there any way to flash a new, working firmware image to the PBP?

[    0.000000] Linux version 5.8.10-2-MANJARO-ARM (gitlab-runner@on2-runner) (gcc (GCC) 10.2.0, GNU ld (GNU Binutil>
[    0.000000] Machine model: Pine64 Pinebook Pro
[    0.000000] efi: UEFI not found.
[    0.000000] [Firmware Bug]: Kernel image misaligned at boot, please fix your bootloader!
[    0.000000] cma: Reserved 64 MiB at 0x00000000f0400000
[    0.000000] Zone ranges:
[    0.000000]  DMA      [mem 0x0000000000200000-0x000000003fffffff]
[    0.000000]  DMA32    [mem 0x0000000040000000-0x00000000f7ffffff]
[    0.000000]  Normal  empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]  node  0: [mem 0x0000000000200000-0x00000000f7ffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000200000-0x00000000f7ffffff]
[    0.000000] On node 0 totalpages: 1015296
[    0.000000]  DMA zone: 4088 pages used for memmap
[    0.000000]  DMA zone: 0 pages reserved
[    0.000000]  DMA zone: 261632 pages, LIFO batch:63
[    0.000000]  DMA32 zone: 11776 pages used for memmap
[    0.000000]  DMA32 zone: 753664 pages, LIFO batch:63

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Are you trying different Uboot versions?  That sounds like the culprit if not.

I have not changed the Uboot version.