SyncBin and TC audio troubles

Hi all, I work everyday with TC audio recorded external from camera.
I've got a BMPCC4K (A cam) and a BMPCC original (B cam), a Zoom F8 (external audio) with a Tentacle Sync E, each for all the equipment.

I tried a lot of time to sync audio and cameras in new SyncBin tool.
Never successfully.

When I select all the files and "sync by timecode", DaVinci seems expecting for the TC slate to synchronise, also in audio files.
NOTE, the audio files (polywave) have got the correct TC stamped, but the TC Slate is empty, and I can't write in the metadata field.
This is the case where I can't use Sync Bin.

Anyone successfully used SyncBin with external audio?
Meanwhile, also if the creation date on camera is wrong (all pocket not maintain the correct date on battery change, as usual ), you can't sync in Sync Bin.
any suggest? it could be a beta issue?
all the best, Corrado

Had same problem. I sync with the tentacle sync studio footage with embedded timecode from a tentacle sync and I recorded the audio with the track-e, both are in sync via the iPhone app. When I play the generated video+synced audio file with vlc, it's perfect, but when I drop the synced file into the time lime, the audio isn't synced anymore.

Any ideas?