Two physical devices seen as one device in Keybase, successfully logged into both

I was logged into Keybase on my Google Pixel 5. I just received a new Google Pixel 9 Pro, and as part of the initial setup had Google copy data from my Pixel 5.

When I launched Keybase, it already knew I was "jdmallen" and asked me to sign in. After I provided my password, I was immediately presented the home screen. I thought this was a bit weird, since I usually have to explicitly add a device using an existing device or paper code. When I pulled up the Devices tab in the app, I saw that both phones self-identify as the same device.



This feels like a serious bug. I tried reporting this on Hacktivity, but it appears to be a 404 now.


I have not done anything with Keybase yet just in case y'all want me to try something. I have a feeling if I clear storage and reinstall, it'll have me set up the new phone like normal.

Start with the Keybase Android app's Devices tab and the reported Pixel 5-to-Pixel 9 Pro data migration scenario. Reproduce the login flow and compare the device identities before and after migration; done means the phones appear as separate devices and the new phone follows the expected device-setup flow.

Written by the indexing model from the issue text.