weird behavior of take profit when trade_on_close = True

[hpicsk]

import pandas as pd
import numpy as np
from backtesting.test import GOOG

tg = GOOG.head(30).copy()
nums = list(range(1,7)) + list(range(6,2,-1)) + list(range(6,20)) + list(range(14,17)) + list(range(15,12,-1))
tg["Open"] = tg["Close"] = tg["High"] = tg["Low"] = nums

from backtesting import Strategy
from backtesting.lib import crossover

class PosChange(Strategy):
    """ 5 days rise buy, with tp = 1.5, sl = 0.8 """
    def init(self):
        pass
    
    def next(self):      
        if len(self.data) >= 5:
            if self.data["Close"][-1] > self.data["Close"][-2] > self.data["Close"][-3] > self.data["Close"][-4] > self.data["Close"]
                print("buy singal: " + str(self.data["Open"].s.index[-1]))
                self.buy(tp=1.5*self.data["Close"][-1], sl=0.8*self.data["Close"][-1])              

from backtesting import Backtest

bt = Backtest(tg, PosChange, cash=100, commission=.000, trade_on_close=True)
stats = bt.run()

bt.plot()
stats._trades

It buys again although it shouldn't have money until the next day.

Although I understand there is no reason to use trade_on_close, are there any plans to fix this behavior?

Additional info

[kernc]

Fixed in 4aee89a.