Interpolations in CJK and Cyrillic languages broken in IE11

[jshoudy11]

Bug
Certain interpolations are being broken into multiple spans. For example in a template we have
{{ctrl.variableName}}.

In Chrome, Firefox, Safari, Edge this always becomes Text associated with variable

but in IE11 in CJK languages this is becoming {{ctrl.variableName}} which displays on our page as the variable.

There are several places this bug is displayed in production for our site but I will include steps to reproduce for just one of them.

To reproduce:

1. Go to https://console.cloud.google.com in IE11
2. Click the hamburger menu in the top left -> click API Manager
3. Click Credentials in the left side nav (if you're prompted to create a project click "Create")
4. Click "Create credentials" -> "API Key" -> "Server Key" -> "Create"
5. Go back to the Credentials Page and click on the name of your new API Key
6. Click the vertical "..." in the top right -> Preferences -> Language and regional formats
7. Change the language to a CJK language (Japanese for example) and click Save
8. The page will reload. Observe the {{ctrl.key.currentKey}} and other variables displayed in the page.

Here is a screenshot of the issue:

** Details **
This is a bug specific to IE11 (and earlier IE). I'm using IE version 11.0.10240.16603 on Windows 10 Enterprise. We are running angular 1.5 but this also occurred in 1.4

[gkalpak]

I can reproduce this. A very similar quirk was fixed with #11796. Ooc, are you using MutationObservers?

[gkalpak]

You don't happen to have a more minimal reproduction (or at least one with unminified sources), do you? 😛

[gkalpak]

I tried my best to reproduce this, but failed miserably. And I have been equally unsuccessful at debugging this directly on https://console.cloud.google.com in IE11. 😟

If someone is able to provide a more "debuggable" reproduction or has access to investigate on the dev environment of https://console.cloud.google.com, that would help a lot 😄

[jshoudy11]

Hey Georgios, thanks for looking into this. I have also not had much luck with getting a minimal reproduction but I do have access to the dev environment. Do you have any ideas for places where I can start to debug?