Problems flashing Aoycocr U3S

I seem to be having issues flashing Aoycocr U3S, which I've successfully flashed before. Well this is a different box but can't see any obvious differences, I'm presuming it's come with different base firmware

I pulled the latest github repo and am running this on docker on Raspberry Pi 4 (same set up as before - I also tried the previous docker image in case there was an issue with the new version)

```
# docker-compose exec tuya start
tuya-convert v2.4.5
======================================================
TUYA-CONVERT

https://github.com/ct-Open-Source/tuya-convert
TUYA-CONVERT was developed by Michael Steigerwald from the IT security company VTRUST (https://www.vtrust.de/) in collaboration with the techjournalists Merlin Schumacher, Pina Merkert, Andrijan Moecker and Jan Mahn at c't Magazine. (https://www.ct.de/)

======================================================
PLEASE READ THIS CAREFULLY!
======================================================
TUYA-CONVERT creates a fake update server environment for ESP8266/85 based tuya devices. It enables you to backup your devices firmware and upload an alternative one (e.g. ESPEasy, Tasmota, Espurna) without the need to open the device and solder a serial connection (OTA, Over-the-air).
Please make sure that you understand the consequences of flashing an alternative firmware, since you might lose functionality!

Flashing an alternative firmware can cause unexpected device behavior and/or render the device unusable. Be aware that you do use this software at YOUR OWN RISK! Please acknowledge that VTRUST and c't Magazine (or Heise Medien GmbH & Co. KG) CAN NOT be held accountable for ANY DAMAGE or LOSS OF FUNCTIONALITY by typing yes + Enter

yes
Checking for network interface wlan0... Found.
Checking UDP port 53... Available.
Checking UDP port 67... Available.
Checking TCP port 80... Available.
Checking TCP port 443... Available.
Checking UDP port 6666... Available.
Checking UDP port 6667... Available.
Checking TCP port 1883... Available.
Checking TCP port 8886... Available.
======================================================
Starting AP in a screen
Starting web server in a screen
Starting Mosquitto in a screen
Starting PSK frontend in a screen
Starting Tuya Discovery in a screen

======================================================

IMPORTANT
1. Connect any other device (a smartphone or something) to the WIFI vtrust-flash
This step is IMPORTANT otherwise the smartconfig may not work!
2. Put your IoT device in autoconfig/smartconfig/pairing mode (LED will blink fast). This is usually done by pressing and holding the primary button of the device
Make sure nothing else is plugged into your IoT device while attempting to flash.
3. Press ENTER to continue

======================================================
Starting smart config pairing procedure
Waiting for the device to install the intermediate firmware
Put device in EZ config mode (blinking fast)
Sending SSID vtrust-flash
Sending wifiPassword
Sending token 00000000
Sending secret 0101
................
SmartConfig complete.
Resending SmartConfig Packets
..../start_flash.sh: line 138: 187 Terminated ./smartconfig/main.py
............................................................................................................
Timed out while waiting for the device to (re)connect
======================================================
Attempting to diagnose the issue...
An ESP82xx based device connected according to your wifi log.
If this is the device you are trying to flash, another issue may be preventing it from flashing.
Otherwise, it could be that the device does not use an ESP82xx or it did not connect.
For additional information, check the *.log files inside the scripts folder.
Please include these logs when opening a new issue on our GitHub issue tracker.
======================================================
Do you want to try flashing another device? [y/N] y
======================================================
```
Logs:
[smarthack-wifi.log](https://github.com/ct-Open-Source/tuya-convert/files/6175918/smarthack-wifi.log)
[smarthack-web.log](https://github.com/ct-Open-Source/tuya-convert/files/6175919/smarthack-web.log)
[smarthack-psk.log](https://github.com/ct-Open-Source/tuya-convert/files/6175920/smarthack-psk.log)

Sadly don't mean a great deal to me

Start with scripts/start_flash.sh and the supplied smarthack-wifi.log, smarthack-web.log, and smarthack-psk.log. Trace the smart-config and reconnect steps around the reported timeout; the issue is resolved when the Aoycocr U3S completes the intermediate-firmware connection and flashing proceeds.

Written by the indexing model from the issue text.