Beta 1.20: Zoophon's World crash

Hi there,
Owner of both GSB games. Love 'em. Thank you for making them. Apologies if this issue has already been reported.

I have a crash bug I’m experiencing on the 9th planet of the single player game (Zoophon’s World). After I setup my ships and hit the fight button, the load screen goes to either 78% or 80% and then crashes to windows desktop.

Here’s the line from errors.txt: 30/3/2015 - 6::4 - Assertion failure:filename:…\src\SIM_Fleet.cpp,linenum:267,build:Beta 1.20

The debug.txt file errors out on the following line repeating over many very close timestamps: [6:16:31:493]- Failed to find ship by ID:…\src\SIM_Ship.cpp 224

My laptop speccy overview (I run the game with the GeForce as default):
Operating System - Windows 7 Home Premium 64-bit SP1
CPU - Intel Core i3 2330M @ 2.20GHz
RAM - 8.00GB Dual-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard - ASUS U31SD (CPU 1)
Graphics - 1366x768@60Hz;Intel HD Graphics 3000;1023MB NVIDIA GeForce GT 520M
Storage - 223GB ATA INTEL SSDSC2CT24 (SSD)
Audio - Realtek High Definition Audio

Hope you can get me sorted out.

v1.21 seems to alleviated the issue. Thanks.