Contribution screen appears unexpectedly (out of Chrome)

### 1. Configuration

* Device brand `(Samsung, etc...)`: Samsung
* Device name `(Galaxy S8, etc...)`:Galaxy S8
* Device model number `(settings > about phone)`: SM - G950F
* Android OS version `(settings > about phone > Android version)`: 9
* Browser: **Chrome**
* Browser version `(settings > apps > Chrome > bottom of page)`: 91.0.4472.164
* Dismoi App version `(settings > apps > Dismoi > bottom of page)`: 1.0.7 (6)
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### 2. Describe the current behavior:

After having opened contributions on the backmarket.fr domain, and the contribution window unexpectedly disappearing without user action, I stopped using my phone for some time. After picking it up, the backmarket contributions appears over the Android home screen after a few seconds.

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### 3. Steps to reproduce:

a. subscribe to 20+ contributeurs
b. open backmarket.fr, click on bubble
c. wait til contribution screen disappears
d. leave phone
e. pick up phone after 10 minutes, contributions show as overlay over anything.

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### 4. Describe the expected behavior

Contribution screen should remain in place until closed, or until Chrome closed.
Contributions and bubble should only appear over Chrome.

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### 4. Additional details (optional)

Write here...