Never-ending blend installation notifications

I am using the passport. When I connect to a computer with USB for the purpose of charging the phone's battery, a notification pops up on the phone stating that the device is trying to install Blend on the computer. When I select 'dismiss', it pops up again a second later. This continues indefinitely, rendering the device unusable while charging via connection to a computer. I do NOT want to install Blend on these computers, because they either are not mine or they are running Linux.

I have tried turning off the 'Allow connections' option in Settings > Device Connections, but this did not solve the issue.

How do I stop these installation notifications, either by preventing the installation attempts or by just preventing the notification of them?

Thanks