bt.plot() - crosshair's line does not go across between charts (vertical crosshair line)

Expected Behavior

Crosshair to show across all plots / subplots - You can see for a particular price, the matching crosshair line to the subchart's RSI value.

Actual Behavior

Crosshair does not show across all plots / subplots - crosshair line does not show in subgraph

Steps to Reproduce

1.Execute the following python code:


import warnings
warnings.simplefilter(action='ignore', category=FutureWarning) # Suppress Future Depreciation Warning in ipynb

from backtesting import Backtest, Strategy
from backtesting.test import GOOG

from backtesting.lib import crossover, plot_heatmaps, resample_apply, barssince

import seaborn as sns # seaborn uses matplotlib
import matplotlib.pyplot as plt
import talib

class RsiOscillator(Strategy):

    # parameters for optimization:
    upper_bound = 70
    lower_bound = 30
    rsi_window = 14

    def init(self):
        price = self.data.Close
        self.daily_rsi = self.I(talib.RSI, price, self.rsi_window)

    def next(self):

        # BarsSince:
        # - Tell you how many bars ago it was true

        if (
                # Daily RSI is greater than upper
                self.daily_rsi[-1] > self.upper_bound
                and
                # 3 days ago the RSI is below upper
                barssince(self.daily_rsi < self.upper_bound) == 3
           ):
            self.position.close() 

        elif (
                # crossover(self.lower_bound, self.daily_rsi)
                self.lower_bound > self.daily_rsi[-1]
             ):
            self.buy(size=1)

bt = Backtest(GOOG, RsiOscillator, cash = 10_000)
stats = bt.run()
bt.plot()

Additional info

Python version: 3.10.4

PIP packages:

appnope==0.1.3 asttokens==2.2.1 backcall==0.2.0 Backtesting==0.3.3 bokeh==3.2.1 comm==0.1.4 contourpy==1.1.0 cycler==0.11.0 debugpy==1.6.7 decorator==5.1.1 executing==1.2.0 fonttools==4.42.0 ipykernel==6.25.0 ipython==8.14.0 jedi==0.19.0 Jinja2==3.1.2 jupyter_client==8.3.0 jupyter_core==5.3.1 kiwisolver==1.4.4 MarkupSafe==2.1.3 matplotlib==3.7.2 matplotlib-inline==0.1.6 nest-asyncio==1.5.7 numpy==1.25.2 packaging==23.1 pandas==2.0.3 parso==0.8.3 pexpect==4.8.0 pickleshare==0.7.5 Pillow==10.0.0 platformdirs==3.10.0 prompt-toolkit==3.0.39 psutil==5.9.5 ptyprocess==0.7.0 pure-eval==0.2.2 Pygments==2.16.1 pyparsing==3.0.9 python-dateutil==2.8.2 pytz==2023.3 PyYAML==6.0.1 pyzmq==25.1.0 seaborn==0.12.2 six==1.16.0 stack-data==0.6.2 TA-Lib==0.4.27 tornado==6.3.2 traitlets==5.9.0 tzdata==2023.3 wcwidth==0.2.6 xyzservices==2023.7.0

kernc / backtesting.py