Black window opens & disappears instantly after selecting channel

Bug Report

Summary

Black window opens & disappears instantly after selecting channel. After, I am brought back to selecting a wireless attack.

What is the current behaviour?

After selecting a channel, a black box appears for less than a second. Then, I have to select an attack again.

How to reproduce

If the current behaviour is a bug, please provide the steps to reproduce it.

Select channel to monitor. Attack doesn't seem to matter.

What do you think the expected behaviour should be?

Not sure, never got passed selecting a channel.

If this is a feature request, what is the motivation or use case for the added feature?

N/A

Specs

Paste the output of ./script/diagnostics.sh [interface] wlan0

#### FLUXION Info
FLUXION V5.9

#### BASH Info 
GNU bash, version 5.0.3(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
**Path:** /bin/bash

#### Interface (wlan0) Info 
**Device**: phy0
**Driver:** wl
**Chipset:** Broadcom Limited BCM43142 802.11b/g/n (rev 01)
**Master Modes** Yes
**Injection Test:** ioctl(SIOCSIWMODE) failed: Operation not supported
ioctl(SIOCSIWMODE) failed: Operation not supported
Failed

#### XTerm Infos
**Version:** XTerm(344)
**Path:** /usr/bin/xterm
Test: XServer/XTerm success!

#### HostAPD Info
hostapd v2.8-devel
User space daemon for IEEE 802.11 AP management,
IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator
Copyright (c) 2002-2019, Jouni Malinen <j@w1.fi> and contributors
Path: /usr/sbin/hostapd

#### Aircrack-ng Info
EXIT
  Aircrack-ng 1.5.2  - (C) 2006-2018 Thomas d'Otreppe
  https://www.aircrack-ng.org

#### Pyrit Info
Pyrit 0.5.1 (C) 2008-2011 Lukas Lueg - 2015 John Mora
https://github.com/JPaulMora/Pyrit
This code is distributed under the GNU General Public License v3+
**Scapy Version:** 2.4.0
Warning: Pyrit has been reported to be incompatible with scapy version 2.4.0 and above. Consult the wiki for further information. This should not affect you, if you don't choose to use pyrit in the script.

#### System Info
**Chipset:** Linux version 4.19.0-parrot4-28t-amd64 (team@parrotsec.org) (gcc version 8.3.0 (Debian 8.3.0-6)) #1 SMP Parrot 4.19.28-2parrot4.28t (2019-04-18)

#### Chipset
Chipset: wl
Chipset doesn't support ap mode
Chipset doesn't support monitor mode
Don't reseve all required information

Expected behavior

Script would progress beyond selecting a channel

FluxionNetwork / fluxion

Black window opens & disappears instantly after selecting channel #734