nostr:npub182sqds7al8sn3nxpks6cg995wqgz5nxd6afn5mtmjymum9xx4zdq2vq6t5 nostr:npub1te686df47h2e4m2ujfm7294sne4nt75xscp7t6ruzpga3ncgq0aqu6zc4l nostr:npub1hjqw4atpe8utwm5qe3z54xnq8tgmnhkhtxvp87hqraz8c0klm6asjtqkdp Gonzalo, I have had issues with Multiband 6 syncing as well. I found this app and it synced my watch every time. It's an iPhone app, so I don't know if it will help. I haven't looked for an Android alternative just yet, but I'm sure there must be something available.
https://apps.apple.com/us/app/radio-wave-sync/id1484233572