Dear User, you may use some of other ways of deleting notifications:

1. Delete all: a bin-looking icon in the upper right corner right near notification settings. 

2. Delete by sliding a notification to the left. 

Thank you.

Dear User, this problem may be caused by internal notification issue on Pixel. You can try to check settings on Battery Optimization. From our side we are working on finding the roots of this problem. Thank you for your patience. 

Dear User, this problem may be caused by internal notification issue on Pixel. You can try to check settings on Battery Optimization. From our side we are working on finding the roots of this problem. Thank you for your patience. 

Dear User,

thank you for your report. Problem exists and will be fixed in the nearest releases. Please stay tuned.

Kind regards,

Oleksandra

Dear User,

please specify if you are having this problem on iPad or iPhone app.

Thank you 

Regards, Aleksandra

Dear User,

does this issue reproduce on regular basis?

This might be caused by network interruptions so please ensure you are having a stable internet connection on your device. App and phone restart may also be helpful.

Do not hesitate to contact us if you have this issue reproduced regularly.

Regards,

Oleksandra

Dear User, this is app issue but it is related to OS version. We are trying to maintain universal quality for most iOS versions. Thank you for helping making our product better. Please stay tuned, this issue will be fixed in the next app version. 

Dear User, this problem may be related to iOS version on your device. Can you please let me know iOS version so I could investigate a problem. Thank you.

Dear User, In order to resolve the issue please let me know OS version and model of your phone. Thank you.

Dear User, in case if you do not have direct button for accessing recent apps, please try to use home button  - in order to activate recent apps you need to long tap on home button. Please do not hesitate to leave a feedback if you have more questions. Thank you.