Setting maxHeight on cdk/overlay is not respected, when used in a mat sidenav

[alexbjorlig]

Reproduction

Steps to reproduce:

1. Open the stackblitz here and open sidenav.
2. Scroll like in the gif below, and open the overlay:

Expected Behavior

maxHeight should be respected in all cases, and have a maximum of 300.

Actual Behavior

When approaching the end of the scroll container, the maxHeight is not respected.

Environment

• Angular: 8.2
• CDK/Material: 8.2
• Browser(s): Version 78.0.3904.70 (Official Build) (64-bit)
• Operating System (e.g. Windows, macOS, Ubuntu): macOS

Some comments:

• How can I further debug this issue? Is there somewhere I can add a console log statement, to provide more information on what is going on? 🙄
• If someone has time to introduce me to the overlay codebase, I would love to help fix this issue 🙋‍♂️
• To what extend this issue is related to Setting maxHeight on overlay with flexibleConnectedTo strategy does not work, when viewport margin is also configured #17567 that I opened yesterday is unclear to me 🤷🏾‍♂️
• If you have an idea for a workaround, I would love to know.

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