This mm6108 binary looks like it’s from our 1.10.2 firmware. The bcf_default.bin you’re using looks to also be 1.10.2 for our mf08251 module.
An earlier log you provided shows the driver is 1.12.4
[43665.162614] morse micro driver registration. Version 0-rel_1_12_4_2024_Jun_11
1.12.4 binaries are available on GitHub. Try replace the mm6108.bin and bcf_mf08251.bin from these artefacts if you are still using 1.12.4.