For what it's worth, I've had thousands of captive bred Clownfish. They instinctively use Anemone to hide. IMO
this isn't a learned behavior. Perhaps after living without an Anemone for a while they no longer feel threatened and are less likely to go into one.
I keep a BTA in my growout tank so that if someone wants a symbiosis between BTA and their new Ocellaris mine are a lot more likely to live in an Anemone. I'm a big advocate of hobbiest propogated marine life so I use Bubble-Tip Anemone. I encourage my customers to seak out a propogated BTA instead of pulling another Anemone out of the ocean.