TypeError Cannot read property 'getItem' of null with VWO integration

[codenamerhubarb]

Since enabling the VWO Segment integration, many days before creating any VWO experiments, I have noticed this error appear in Bugsnag for several users:

TypeError Cannot read property 'getItem' of null
https://dev.visualwebsiteoptimizer.com/web/djIkdGU6Ni4wOmFzeW5jJWdxdWVyeQ==/tag-9ccc69fb8de21986f87f9ea7553668ba.js:92:12 g._getWebStore
https://dev.visualwebsiteoptimizer.com/web/djIkdGU6Ni4wOmFzeW5jJWdxdWVyeQ==/tag-9ccc69fb8de21986f87f9ea7553668ba.js:92:457 get
https://dev.visualwebsiteoptimizer.com/web/djIkdGU6Ni4wOmFzeW5jJWdxdWVyeQ==/tag-9ccc69fb8de21986f87f9ea7553668ba.js:77:153 Object.setPastTriggers
https://dev.visualwebsiteoptimizer.com/web/djIkdGU6Ni4wOmFzeW5jJWdxdWVyeQ==/tag-9ccc69fb8de21986f87f9ea7553668ba.js:104:156 Object.setPastTriggers
https://dev.visualwebsiteoptimizer.com/web/djIkdGU6Ni4wOmFzeW5jJWdxdWVyeQ==/tag-9ccc69fb8de21986f87f9ea7553668ba.js:254:206 onUrlChange
https://dev.visualwebsiteoptimizer.com/web/djIkdGU6Ni4wOmFzeW5jJWdxdWVyeQ==/tag-9ccc69fb8de21986f87f9ea7553668ba.js:110:264 History.a.
node_modules/@bugsnag/browser/dist/bugsnag.js:2722:9 History.t.
https://connect.facebook.net/en_US/fbevents.js:25:31098 History.b. [as pushState]
node_modules/braintree-web/lib/destructor.js:19:23
node_modules/promise-polyfill/src/index.js:141:8 Object.confirmTransitionTo

Detailed stacktrace:

It always happens after a History pushState event in our React app:

It affects mostly the Chrome mobile web browser on Android.
Affected users can't change the page they are on (history.pushState no longer works). I have verified that this is the case using FullStory.