Tail resonance comes and goes on mine.
The trick is the realize at what stock location that comes and go past that quick so it doesn't get stuck there. I sometimes flip idle up and it just never returns. I am using xtreme tail blades and used kbdd's before.. So I didn't balance any.
As far as bearing failure.. Check for play in the flanged bearings in the tail. See if you have too much vertical play in that output shaft on tail... More vertical play means dead bearing. Till recently I just kept buying blade replacement ones and replacing them when needed. I flew and crashed a lot. So it takes a toll. But needless to say, those blade flanged bearings on the two sides of that tail output shaft aren't the best quality and have a very short life.
You can buy microheli or lynx or xtreme bearings from websites like tmkarc1hobby (my fav) or eBay
Or there is boca bearings company making some bearings which aren't flanged but fit it...
All this to say... Rember one thing with 130.. Respect the physical Maintanence of this bird like you would a big bird. Pre flight check .. Going over wiring and bearings .. Looking for play.. Nicks... So on and so forth. Cleaning periodically... If you do that, you will not run into a wall ever.
If you don't and treat it like we used to mcpx or msr.. Then it's gonna backfire ...
Fly safe!!

have fun!