Tensorboard is not plotting time series

This recently stopped working, and I’m not sure why, and not sure where to go for help.
The data points seem to be present (as seen in the pic by hovering the mouse nearby), yet the line is not plotted. If I switch to scalars, I can see the plots (they don’t autoscale, etc.)

Thanks for any suggestions!

pip freeze | grep -i tensor

tensorboard==2.15.2
tensorboard-data-server==0.7.2
tensorflow==2.15.0.post1
tensorflow-datasets==4.9.4
tensorflow-estimator==2.15.0
tensorflow-io-gcs-filesystem==0.35.0
tensorflow-metadata==1.14.0
tensorpac==0.6.5
tensorrt-bindings==8.6.1
tensorrt-libs==8.6.1
types-tensorflow==2.12.0.10

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