Crash on applying ChromaKey

Ubuntu 14.04 x64
RAM: 8GB
Processor: Intel Core i5 CPU M 540 @ 2.53GHz x4
Graphics: NVS 5100M/PCIe/SSE2
Version of Openshot: 2.0.6 (Installed via PPA) & 2.0.7 (ran using downloaded .appimage)
BZR Revision used (if any) : ?? not sure, can't find any packages called BZR
MLT/melt version: libmlt6 0.9.3+git20141005.22abed67-0ubuntu0~sunab~trusty1 amd64
FFmpeg (i.e.libavcodec) version : libavcodec54:amd64 6:9.18-0ubuntu0.14.04.1 amd64
FFmpeg installation : libxine2-ffmpeg 1.2.4-2ubuntu1 amd64

Steps to reproduce issue:
Open Openshot
import video / open saved project.
switch to effects tab
drag Chroma effect to video in timeline.
double click chroma color
click "Pick Screen Color" button
click spot on preview panel
click OK. *** sometimes crashes here ***
double click Fuzz, set new value, hit tab. *** sometimes crashes here ***

Part of what is odd about this error is sometimes if I hit save between each step I can keep moving forward with adding new chroma effects. Because my bluescreen is not very good I'm having to build several chroma effects on the video in an attempt to remove all of the color variations. the issue starts happening more often the more chroma effects I add. If I keep saving my project after each change I'm sometimes able to add more chroma effects after I reopen the project file. But at some point ~15 chroma effects added to a video track it just keeps crashing after hitting ok on the color picker dialog. I've also been able to reproduce the issue running as my normal user and under SUDO. The orignal videos were recorded using my phone camera in MP4 format. I've tried a couple different recordings with the same results the general video info is below:

Video:
Length: 1 minute 1 second
Container: Quicktime
Dimensions: 1920x1080
Codec: H.264
Framerate: 30fps
Bitrate: 17077 kbps

Audio:
Codec: MPEC-4 AAC
Channels: Stereo
Sample rate: 48Khz
Bitrate: 96 kbps

If you need any additional details please let me know.

Last several console lines from a couple different crashes, gathered by running 2.0.7 from terminal.

Crash after clicking OK on the chroma pick color dialog:
timeline_webview:INFO $scope.SelectEffect
properties_model:INFO Update item: effect
properties_model:INFO updating clip properties model.
properties_model:INFO Getting properties for frame 1: OrderedDict([('duration', {'closest_point_x': -1, 'memo': '', 'value': 0.0, 'max': 1800000.0, 'type': 'float', 'min': 0.0, 'name': 'Duration', 'readonly': True, 'keyframe': False, 'interpolation': 2, 'choices': [], 'points': 0}), ('end', {'closest_point_x': -1, 'memo': '', 'value': 0.0, 'max': 1800000.0, 'type': 'float', 'min': 0.0, 'name': 'End', 'readonly': False, 'keyframe': False, 'interpolation': 2, 'choices': [], 'points': 0}), ('fuzz', {'closest_point_x': 1, 'memo': '', 'value': 7.0, 'max': 10000.0, 'type': 'float', 'min': -10000.0, 'name': 'Fuzz', 'readonly': False, 'keyframe': True, 'interpolation': 2, 'choices': [], 'points': 1}), ('id', {'closest_point_x': -1, 'memo': 'GSOLMZ7KZL', 'value': 0.0, 'max': -1.0, 'type': 'string', 'min': -1.0, 'name': 'ID', 'readonly': True, 'keyframe': False, 'interpolation': 2, 'choices': [], 'points': 0}), ('color', {'closest_point_x': 1, 'memo': '', 'value': 0.0, 'green': {'closest_point_x': 1, 'memo': '', 'value': 46.0, 'max': 10000.0, 'type': 'float', 'min': -10000.0, 'name': 'Green', 'readonly': False, 'keyframe': True, 'interpolation': 1, 'choices': [], 'points': 1}, 'max': 10000.0, 'red': {'closest_point_x': 1, 'memo': '', 'value': 46.0, 'max': 10000.0, 'type': 'float', 'min': -10000.0, 'name': 'Red', 'readonly': False, 'keyframe': True, 'interpolation': 1, 'choices': [], 'points': 1}, 'type': 'color', 'min': -10000.0, 'name': 'Key Color', 'readonly': False, 'keyframe': True, 'interpolation': 1, 'blue': {'closest_point_x': 1, 'memo': '', 'value': 43.0, 'max': 10000.0, 'type': 'float', 'min': -10000.0, 'name': 'Blue', 'readonly': False, 'keyframe': True, 'interpolation': 1, 'choices': [], 'points': 1}, 'points': 1, 'choices': []}), ('layer', {'closest_point_x': -1, 'memo': '', 'value': 0.0, 'max': 1000.0, 'type': 'int', 'min': 0.0, 'name': 'Layer', 'readonly': False, 'keyframe': False, 'interpolation': 2, 'choices': [], 'points': 0}), ('position', {'closest_point_x': -1, 'memo': '', 'value': 0.0, 'max': 1800000.0, 'type': 'float', 'min': 0.0, 'name': 'Position', 'readonly': False, 'keyframe': False, 'interpolation': 2, 'choices': [], 'points': 0}), ('start', {'closest_point_x': -1, 'memo': '', 'value': 0.0, 'max': 1800000.0, 'type': 'float', 'min': 0.0, 'name': 'Start', 'readonly': False, 'keyframe': False, 'interpolation': 2, 'choices': [], 'points': 0})])
properties_model:INFO {'start': 0.0, 'color': {'alpha': {'Points': []}, 'blue': {'Points': [{'interpolation': 1, 'co': {'Y': 43, 'X': 1}}]}, 'red': {'Points': [{'interpolation': 1, 'co': {'Y': 46, 'X': 1}}]}, 'green': {'Points': [{'interpolation': 1, 'co': {'Y': 46, 'X': 1}}]}}, 'fuzz': {'Points': [{'interpolation': 2, 'co': {'Y': 7.0, 'X': 1.0}}]}, 'id': 'GSOLMZ7KZL', 'layer': 0, 'duration': 0.0, 'order': 0, 'end': 0.0, 'type': 'ChromaKey', 'position': 0.0}
properties_model:INFO looping points: co.X = 1
properties_model:INFO updating point: co.X = 1 to value: 99.0
properties_model:INFO looping points: co.X = 1
properties_model:INFO updating point: co.X = 1 to value: 119.0
properties_model:INFO looping points: co.X = 1
properties_model:INFO updating point: co.X = 1 to value: 113.0
Segmentation fault (core dumped)

Crash after changing fuzz:
preview_thread:INFO refreshFrame
preview_thread:INFO self.player.Position(): 174
properties_model:INFO fuzz for FR4P6F6832 changed to 15.0 at frame 1 with interpolation: -1 at closest x: 1
properties_model:INFO {'type': 'ChromaKey', 'end': 0.0, 'start': 0.0, 'id': 'FR4P6F6832', 'layer': 0, 'order': 0, 'duration': 0.0, 'fuzz': {'Points': [{'co': {'X': 1.0, 'Y': 5.0}, 'interpolation': 2}]}, 'position': 0.0, 'color': {'alpha': {'Points': []}, 'red': {'Points': [{'co': {'X': 1, 'Y': 68}, 'interpolation': 1}]}, 'green': {'Points': [{'co': {'X': 1, 'Y': 81}, 'interpolation': 1}]}, 'blue': {'Points': [{'co': {'X': 1, 'Y': 93}, 'interpolation': 1}]}}}
properties_model:INFO looping points: co.X = 1.0
properties_model:INFO updating point: co.X = 1.0 to value: 15.0
Segmentation fault (core dumped)