Probably that would be what that happened. If I remember correctly, I used Bluewallet on Android 9 phone and it worked, but I could not remember if it was actually Android 9 or 10 that I used it with because I upgraded the phone to Android 10 at the time. The new phone that I am using now is Android 11, I upgraded it to Android 12. I had Bluewallet on it when it was Android 11 and also know when it is running Android 12, no issue, maybe because it is mid-range phone. I noticed that Bluewallet is not light to load and it can crash anytime when I used it with Android 9/10, but my phone at the time was using 2 gigabyte ram and very lesser processor at the time. I guess Bluewallet may not load easily on low spec phones too and it may crash at times, but not all the time. Using Bluewallet on low budget phone is frustrating but outdated OS might have been the reason for it not working at all.