This star has now returned to its normal range of magnitudes. There is a paper that has appeared in the Astronomical Journal (https://iopscience.iop.org/article/10.3847/1538-3881/ace59d) where the authors have imaged the star during the great dimming using interferometry. They say that they saw an asymmetry in the stars photosphere which suggests a mass ejection of material. This would have cooled and formed a dust cloud that dimmed the star. This is similar to what happened to Betelgeuse in 2020.
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