gennadyFauna

**Describe the bug** This bug came up in the process of generating [this](https://github.com/Fauna-Bio/GG_2025/blob/pydeseq2_bug/5_differential_expression_xistposneg.ipynb) notebook for [our recent preprint](https://www.biorxiv.org/content/10.1101/2025.04.09.648005v1). As part of the workflow, we fit a simple model with two...