I have a similar story. I made an Android app which was getting like 2K installs a day. The app was meant for non-english speakers in India.
I started getting hundreds of emails on by developer email with empty body and empty subject text. I wrote back asking why they did it and never got a reply.
The friction to find and email a developer is pretty high in playstore. Then when I actually travelled to India and started low bandwidth networks I realized what was happening. There was some scrolling issue on playstore where people actually attempted to click on a related app but ended up touching developer email. Not knowing how to close the gmail's compose screen they instead pressed on send. (Many of these users dont know how to use email).
I started getting hundreds of emails on by developer email with empty body and empty subject text. I wrote back asking why they did it and never got a reply.
The friction to find and email a developer is pretty high in playstore. Then when I actually travelled to India and started low bandwidth networks I realized what was happening. There was some scrolling issue on playstore where people actually attempted to click on a related app but ended up touching developer email. Not knowing how to close the gmail's compose screen they instead pressed on send. (Many of these users dont know how to use email).