From NASA: Potentially, A Breakthrough (Understatement of The Century)

[True Blue Door]

3. Yeah, obviously.

The most likely outcome is indeed that a subtle mechanism will be found that accounts for the observed effect through mundane processes, as I note.

But the likelihood that it proves to be a real exotic effect is now nontrivial, having been experimentally observed by highly credible researchers.

And let's not forget that the observed effect was expected by the designers of the technology. The observational evidence conforms with the predictions of the system's creators. It would be a bit of a coincidence if they arrived at correct predictions - ones that do not occur under standard assumptions - using false theoretical tools.

Or at least that's my semi-educated opinion, which of course is 100% subordinate to whatever actual scientists think.