The phrase "a puzzling feature of" is correct and usable in written English.
It can be used when discussing an aspect or characteristic of something that is confusing or difficult to understand.
Example: "A puzzling feature of the new software is its inconsistent performance across different devices."
Alternatives: "an intriguing aspect of" or "a perplexing element of".
A puzzling feature of the geneticists' finding is that the Manchu Y chromosome they identified is quite rare in Liaoning, the original home province.
Having the sequence of units in DNA determine the placement of nucleosomes would explain a puzzling feature of transcription factors, the proteins that activate genes.
It is a puzzling feature of the argument of Metaphysics IV 4 that distinctive properties are not explicitly mentioned.
Our skeletochronological data also identify a puzzling feature of this endangered lizard's life history: its low adult survival rate.
A puzzling feature of the 3' transduction events is that the sequence transduced is unique in the reference genome.
A puzzling feature of d-type crypts is that they are invisible before decolorization, although they are supposed to be stained by MB.
Dr John Philpott, director of The Jobs Economist, said: "A particularly puzzling feature of the findings is that they show growth in median weekly pay across the UK regions between 2012 and 2013 to be a mirror image of regional unemployment rates, with unemployment hot spots registering the biggest pay rises.
A puzzling feature in our results, however, is that the relative abundance of Proteobacteria on the skin of atopic individuals was not related to land-use types in the environment, a finding that needs further consideration.
Parkinsonian resting tremor has a puzzling feature that distinguishes it from other Parkinson's disease symptoms: in some patients, tremor severity tends to decrease instead of worsen during disease progression (Toth et al., 2004; Lees, 2007).
Hubble pointed out an important and puzzling feature of the resolvability of M31.
That's an interesting property that may help to explain another puzzling feature of human memory called chunking.
