great to hear you found the root cause!! here are some answers to your questions:
this can’t be done if you’re using customized Time format, you could use
Hour of Day instead of
Expression if you don’t need to format the display of Hour groupings.
this unfortunately cannot be done currently, feel free to share in Product suggestions - Tulip Community if you’d like. I will mention that if you embed the Analysis in an App, you can overlay text to display more detailed contextual information.
if you navigate to
Y Axis, you can define the Label and Save the update:
hope this helps, let us know if you have further questions!!