With Sony Fx-3 and Sony a7rv using TentacleSyc for External Timing, and multiple TencleSyc-E's for audio.
When imported to Premiere Pro or imported as a TencleSync App xml file. If syncing in Premiere Pro to create a multicam sequence, there is an error message indicating that some of the footage is missing TC and can not be synchronized.
If manually synchronized using TC or by opening the XML file, and then creating a multicamera sequence, all appears okay, but then if you make any edits, close out the project, and reopen ... the audio tracks appear grayed out and with stripes.
It is not possible to relink or resync the audio clips and so makes the whole proejct unrecoverable and useable.