🐞 bug report

Affected Package

It seems like any angular version with Ivy enabled is affected.

Is this a regression?

Since Ivy is enabled by default in the newer versions I would say yes, it's a regression.

Description

Plurals ICU expressions prevent following markup from being rendered when used within ng-container with ngIf on it. For version 10 it's true only for subsequent renderings, see examples in the next section.
Short code example:

  <ng-container *ngIf="true">
    you have {{ 1 }} {1, plural, one {task} other {tasks}} to do
  </ng-container>

On subsequent renderings the code above will render you have 1 task

🔬 Minimal Reproduction

Toggle block visibility by clicking button to see how the result is changed

https://stackblitz.com/edit/plural-ng8 - all is OK
https://stackblitz.com/edit/plural-ng9rc1 - is OK with Ivy disabled, otherwise the behavior is wrong for both first and subsequent renderings
https://stackblitz.com/edit/plural-ng10 - is OK with Ivy disabled, otherwise the behavior is wrong only for subsequent renderings

🔥 Exception or Error

Nothing is logged

🌍 Your Environment

Angular Version:
Please see stackblitz examples dependencies above