Screenshots get swapped between devices when two instances of AppiumDriver are executed in parallel

Description

I'm using two instances of AppiumDriver in separate threads for automating a mobile app on two Android devices in parallel. When a test case fails on both the devices, I'm trying to capture a screenshot of the devices using the following code snippet.
((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);

The screenshots are saved in different directories named after the device names, but sometimes (2 out of 3), the screenshots created get swapped between the devices. That means if I'm using a Tab and a Phone for testing, the screenshot of the Tab gets created inside the directory created for Phone and vice versa.

I'm pretty sure there are two separate instances of AppiumDriver running on different ports as the entire test suit (~100+ tests) runs smoothly on both the devices without a problem. Just the screenshots get swapped between the devices.

Any help or pointers in the right direction are much appreciated.

Environment

• Java client build version or git revision if you use some snapshot:
• Appium server version or git revision if you use some snapshot:
• Desktop OS/version used to run Appium if necessary:
• Node.js version (unless using Appium.app|exe) or Appium CLI or Appium.app|exe:
• Mobile platform/version under test:
• Real device or emulator/simulator:

Source Code

Find a very brief (dirty) representation of my code flow here

Environment

• Appium version: 1.18.0
• Desktop OS/version: Mac OS Catalina 10.15.5
• Node.js version: v12.16.1
• Npm or Yarn package manager: Npm (v6.13.4)
• Real device or emulator/simulator: Real Devices
• Appium CLI or Appium.app|exe: Appium

Start with the linked gist and the parallel test flow around getScreenshotAs(OutputType.FILE), then reproduce the issue with two AppiumDriver instances on separate devices. Done means each captured screenshot is consistently saved under the directory for the device that produced it.