The region around 150 Hz has fairly high phase slope at import and it looks like the tabs, prior to the Phase Adjust tab, have added additional phase slope; which looks to be from HP filtering. The result is a phase slope high enough that it’s marginal*, in the plotting, between showing a step between plot points (as in your screenshot) and wrap. Given that this freq region way out of band – it looks to be at approximately -60 dB relative to the passband – it’s safe to ignore.
* The plotting groups/averages the >16000 raw FFT data points into a smaller log frequency spaced set at approx. 1/96th oct spacing. Sometimes in this averaging, very high phase slope regions can go either way.