The version of QP5 that should contain this fix is available in Toad for Oracle Beta 14.2.71 and higher, and will be available in the full 14.2 version once it's released in about a month or so. Unfortunately, there is no separate download for QP5 standalone. The best way to get it is to download the beta and use it with that version of Toad.
You can find the beta version here:
Feel free to give it a shot there and let us know if you run into any problems.