Auto-detect frame rate?

In the manual it states, under “Technical Specifications”:

Automatically detects and takes over incoming frame rate on jam-sync

Does this mean that regardless of what frame rate the Tentacle is set to it should switch over when it receives a valid timecode signal? That is how I am reading it, yet it does not appear to be the case. Depending on the two rates I can get it to accept the timecode jam, but it does not adjust its frame rate to match that of the external source.

Firmware is 3.70. I’m testing it against a Sound Devices 633. Manually setting the frame rate in TentacleSetup works. It just doesn’t automatically detect it.