monaco-editor: nls error on reload page - from time to time - vers 0.19.0

Chrome: Version 79.0.3945.88 (Official Build) (64-bit) Windows 10 Pro: 1909

Doesn’t always occur - but on many fast reloads - running in Webpack debug mode.

nls.js:47 Uncaught TypeError: Cannot read property 'replace' of undefined
    at n (nls.js:47)
    at Object.localize (nls.js:85)
    at folding.ts:869
    at Function.t._invokeFactory (loader.js:1036)
    at t.complete (loader.js:1046)
    at s._onModuleComplete (loader.js:1660)
    at s._onModuleComplete (loader.js:1666)
    at s._onModuleComplete (loader.js:1666)
    at s._resolve (loader.js:1578)
    at s.defineModule (loader.js:1266)

BTW: pretty cool with all the closed issues and fixes! Well done! 😃