default_region="point" crashes for timeseries

[ahuang11]

import panel as pn
import numpy as np
import pandas as pd
import hvplot.pandas
import numpy as np
import holoviews as hv

from holonote.annotate import SQLiteDB, Annotator
from holonote.app import PanelWidgets

pn.extension()

curve = pd.read_parquet("assets/example.parquet").hvplot(x="TIME")
connector = SQLiteDB(table_name="test_app")
fields = ["Stoppage", "Reason", "Category"]
annotator = Annotator({"TIME": np.datetime64, "SPEED": float}, fields=fields, connector=connector, default_region="point")
annotator_element = annotator * curve

fields_values = {
    "Stoppage": ["Yes", "No"],
    "Category": ["Mechanical", "Electrical", "Process", "Other"],
}

w = PanelWidgets(annotator, field_values=fields_values)

pn.Row(w, annotator_element)

traceback

  File "/Users/ahuang/repos/holonote/holonote/annotate/display.py", line 346, in _filter_stream_values
    x = (bounds[0] + bounds[2]) / 2
numpy.core._exceptions._UFuncBinaryResolutionError: ufunc 'add' cannot use operands with types dtype('<M8[us]') and dtype('<M8[us]')```