Avoid flaky expectations capturing values during a hardcoded time interval

[defagos]

Description

This PR avoids expectations capturing values during a hardcoded time interval, which can be much flakier on a CI agent.

Changes made

• Replace such expectations with their at least counterpart.
• Tweak other legitimate expectation intervals for consistency (500 ms).

Checklist

• APIs have been properly documented (if relevant).
• The documentation has been updated (if relevant).
• New unit tests have been written (if relevant).
• The demo has been updated (if relevant).