SQUASHFS error: Unable to read symlink

I'm using image builder to build 22.03.3 and when writing the new firmware, I see the following.
The device is a glinet mt300n v2, if it matters.
It doesn't seem to affect use of the router however so not sure if it's a problem or not.

Tue Jul  4 15:52:47 2023 daemon.info procd: - shutdown -
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.077321] SQUASHFS error: Failed to read block 0x63e5f6: -5
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.083245] SQUASHFS error: Unable to read metadata cache entry [63e5f4]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.090060] SQUASHFS error: Unable to read symlink [63df76:1ff7]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.099836] SQUASHFS error: Unable to read metadata cache entry [63e5f4]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.106678] SQUASHFS error: Unable to read symlink [63e5f4:1c]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.115120] SQUASHFS error: Unable to read metadata cache entry [63e5f4]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.122033] SQUASHFS error: Unable to read symlink [63e5f4:42]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.129849] SQUASHFS error: Unable to read metadata cache entry [63e5f4]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.136669] SQUASHFS error: Unable to read symlink [63e5f4:6b]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.147424] SQUASHFS error: Unable to read metadata cache entry [63e5f4]
Tue Jul  4 15:52:47 2023 kern.err kernel: [  355.154320] SQUASHFS error: Unable to read symlink [63e5f4:97]
Tue Jul  4 15:52:48 2023 authpriv.info dropbear[1099]: Early exit: Terminated by signal
Tue Jul  4 15:52:48 2023 authpriv.info dropbear[3995]: Exit (root) from <192.168.192.205:33111>: Terminated by signal