Due to them being files on the internal SD, I assumed these wouldn't be part of the firmware file as I had previously re-flashed this which passed successfully and made zero difference...
However, I did replicate the partitions on the old SD onto the new one and copied all files in each partition except the corrupt files above and with a newer map file as mine was also corrupt. This seems to have fixed my issues.
Afterwards I have also re-flashed the firmware as a belt and braces approach.
Thread can be closed!
Thanks!
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