Codestream: JetBrains :: EAP Version :: Running IDE Always Opens A Duplicate Editor Window

Describe the bug
It appears that this issue is somehow caused by CodeStream as it does not happen when I disable the plugin: https://youtrack.jetbrains.com/issue/WI-49510

System Info (please complete the following information):

=== About ===
Build version: PhpStorm 2019.3 EAP Build #PS-193.4932.16 October 31, 2019
Java version: 11.0.4+10-b520.2amd64
Operating System: Linux (5.3.7-arch1-2-arch, amd64)
JVM version: OpenJDK 64-Bit Server VM JetBrains s.r.o

=== System ===
Number of CPU: 24
Used memory: 748Mb 
Free memory: 363Mb 
Total memory: 1112Mb 
Maximum available memory: 3959Mb

=== Displays ===
Displays: 
Display 0: 2560x1440; scale: 1.00

=== Plugins ===
Custom plugins: [Material Theme UI (4.9.1), CodeStream (5.1.0+22), Ideolog (193.0.15.0), HashiCorp Terraform / HCL language support (0.7.7)]
Disabled plugins:[Angular and AngularJS (193.4932.16), BashSupport (1.7.10.192), IntelliPort (1.0), Python (2019.1.191.6183.20), String Manipulation (7.2.182.000.3), Thursday (0.1.2), Switch Component files (1.0), Nord (0.8.1), Codealike (1.5.0.29), Find Pull Request (1.6.1), Gray Theme (1.1.1), React snippets (1.1.0), Theme Collection (0.8), Php Inspections (EA Extended) (4.0.1), JS Toolbox (1.9), One Dark theme (3.1.0), Gradianto (3.6), ESLint (1.0.36), Interesting Theme (1.3), Atom OneDark Theme (1.6), One Dark Native (1.4), Extra Icons (1.12.0.183), deep-assoc-completion (2019.10.28.001), Case conversion (0.5.1), .ignore (3.2.2.192), Makefile support (1.6.1), Code::Stats (1.0.6), CodeGlance (1.5.4), jsondiff (0.2), silkworm (1.0.7)]

Log Files
See issue linked in description