React version: 0.0.0-241c4467e (current next) and 16.12.0
Devtools: 4.4.0 (1/3/2020). [...] Created from revision f749045 on 1/3/2020.

Steps To Reproduce

1. Visit https://codesandbox.io/s/usedebugvalue-complex-types-3x877
2. Inspect App Component
3. NoHooksAtAll displays no hooks at all
4. IgnoredComplexValue displayes the custom hook but without a value
5. NoHooksAtAll displays the custom hook with its value

Link to code example:

The current behavior

Complex values (and custom hooks) are sometimes not displayed

The expected behavior

Implementation of components and hooks should not affect if these are displayed.