BUG - strategy.direction.all

//@version=2
strategy(title='test', shorttitle='T', overlay=true, initial_capital=100000, currency=currency.USD)
strategy.risk.allow_entry_in(strategy.direction.all)
trade_size = input(10000.0)
take_profit_in_ticks = input(500)
stop_loss_in_ticks = input(50)
//  ||-----------------------------------------------------------------------------------------------------------------------------------------------------------||
trade_session = input(title='Trade Session:', type=string, defval='0400-1500', confirm=false)
istradingsession = not na(time('1', trade_session))
bgcolor(istradingsession?gray:na)
//  ||-----------------------------------------------------------------------------------------------------------------------------------------------------------||
strategy.entry('buy', long=true, qty=trade_size, when=change(istradingsession) > 0)
strategy.entry('sel', long=false, qty=trade_size, when=change(istradingsession) > 0)
strategy.exit('exit buy', from_entry='buy', profit=take_profit_in_ticks, loss=stop_loss_in_ticks)
strategy.exit('exit sel', from_entry='sel', profit=take_profit_in_ticks, loss=stop_loss_in_ticks)
strategy.close_all(when=change(istradingsession) < 0)