My signal app the other day had 2 seperate, a few days apart, updates from the app itself. Asking for install from unknown sources to check in the settings to be checked. Doing this outside of both stores which usually update the app from F droid or Aurora.

Seems odd that the signal app itself asked to update itself from a notification from the drop down menu. How can I make sure it has not been compromised? Anyone else experienced something of the sort?