Ignore is sometimes ignored

It would be helpful if this limitation was referenced in the documentation:

https://github.com/aspnet/EntityFrameworkCore/issues/11948

I've run into it a couple times and spent time researching it more than once because I forgot about it.

Thank you.

---
#### Document Details

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* ID: 9e991715-3d6c-a8c5-1c0b-416d5a8b84b8
* Version Independent ID: 3a90f8a5-7d95-d257-f971-4abb4546c34a
* Content: [Including & Excluding Types - EF Core](https://docs.microsoft.com/en-us/ef/core/modeling/included-types#feedback)
* Content Source: [entity-framework/core/modeling/included-types.md](https://github.com/aspnet/EntityFramework.Docs/blob/master/entity-framework/core/modeling/included-types.md)
* Product: **entity-framework**
* Technology: **entity-framework-core**
* GitHub Login: @rowanmiller
* Microsoft Alias: **avickers**