Smilie said what I was going to say; she is needing more forward. I think when you took a horse whose answer for every question was MORE forward, to the point of rushing, and you got into her mouth with the bit and rein trying to get her softer, you got her more worried about the rein, and your desire to shut down her rushing.
Now she has become evasive of the rein by being so soft and mushy and wiggly that the rein/bit contact is not connected to her feet and body.
The answer is to get her going forward freely. Then, if you want to get her softer, do it with going forward briskly, and if she comes behind the bit, leg her forward energetically.