That. Is. Not expected. At all.
She runs a standard diagnostic for whether she is hallucinating; returns 'either no or it is still best path-selection to proceed as though no'.
It is not completely impossible that the Imperial government or some other group is running a very extensive successful secret experiment in biological engineering. It is not, altogether, very likely. A priori, 'transportation to another world' and similar events are also at the least, not likely. But popular reaction notwithstanding it it quite the opposite of scientific to proclaim occurring events to be impossible. (Color-changing beads, no clear strata, the unfamiliar island - observations move to connections.)
Tabula rasa. If that is the case, she cannot make assumptions about patterns she is accustomed to applying being applicable or true, must observe without expectation. The brain will easily fall into familiar patterns, underproduce the very strange. A bias to keep in mind, and to oppose.
As simpler beginning, she considers her previous reasoning set.
'On purpose' is less likely. There might be some reasons to attempt experimental translocation on a slave not one's own. There are far less to send such one to a different world. The layout of accident possibilities remain possibilities. Additional possibility that it was done from this world, and not hers. That could be on purpose still; she does not know what motivations they might hold. If most anyone in the world had discovered and was aware of another, Myra would have known, and so she would have known. Not certainty. But sufficient probability.
She lacks data about what this world may hold and how to act in it. This current situation at the least appears stable.
She continues to stay.