The SoapUI Search plugin isn't a bundled plugin, it was developed by an individual contributor, Anur KS (http://arun-aks.blogspot.ru/), who is supposed to maintain the plugin if any issues occur in it. So, you can reach out to him.
In the meantime, you can stay on ReadyAPI 2.1.0 (where the plugin seems to work well):
Thanks Anastasia. Do you have contact details for Arun KS on file? It'd be great if someone at SmartBear could please reach out to Arun and ask them to either fix this plugin or point us in the direction of a GitHub repo where we could patch up the code?