Welcome to MobX. Please provide as much relevant information as possible!

If at all possible, provide a **minimal** sample reproduction. **Create a minimal reproduction based on this [jsfiddle](https://jsfiddle.net/mweststrate/f0dptdau/2/)**

I have a:

1. [ ] Question: Feel free to just state your question. For a quick answer, there are usually people online at our [Gitter](https://gitter.im/mobxjs/mobx) channel
2. [ ] Issue:
  * [ ] **Provide error messages including stacktrace**
  * [ ] Provide a **minimal** sample reproduction. **Create a reproduction based on this [jsfiddle](https://jsfiddle.net/mweststrate/f0dptdau/2/)**
  * [ ] Did you check this issue wasn't filed before?
  * [ ] Elaborate on your issue. What behavior did you expect?
  * [ ] State the versions of MobX and relevant libraries. Which browser / node / ... version?
3. [ ] Idea:
  * [ ] What problem would it solve for you?
  * [ ] Do you think others will benefit from this change as well and it should in core package (see also mobx-utils)?
  * [ ] Are you willing to (attempt) a PR yourself?

Please tick the appropriate boxes. Feel free to remove the _other_ sections.

**Please be sure to close your issues promptly.**

Welcome to MobX. Please provide as much relevant information as possible!

If at all possible, provide a **minimal** sample reproduction. **Create a minimal reproduction based on this [jsfiddle](https://jsfiddle.net/mweststrate/f0dptdau/2/)**

I have a:

1. [ ] Question: Feel free to just state your question. For a quick answer, there are usually people online at our [Gitter](https://gitter.im/mobxjs/mobx) channel
2. [ ] Issue:
  * [ ] **Provide error messages including stacktrace**
  * [ ] Provide a **minimal** sample reproduction. **Create a reproduction based on this [sandbox](https://codesandbox.io/s/v3v0my2370)**
  * [ ] Did you check this issue wasn't filed before?
  * [ ] Elaborate on your issue. What behavior did you expect?
  * [ ] State the versions of MobX and relevant libraries. Which browser / node / ... version?
3. [ ] Idea:
  * [ ] What problem would it solve for you?
  * [ ] Do you think others will benefit from this change as well and it should in core package (see also mobx-utils)?
  * [ ] Are you willing to (attempt) a PR yourself?

Please tick the appropriate boxes. Feel free to remove the _other_ sections.

**Please be sure to close your issues promptly.**

Use code sandbox instead of js fiddle now as issue baseline
Use code sandbox instead of js fiddle now as issue baseline