I have just made two new symbols:
TEST\_ANTENNA\_1
TEST\_ANTENNA\_2
When I do SHIFT+F, there they are in my workspace:

But If I search for:
TEST\_ANTENNA\_1
or
TEST\_ANTENNA\_2
 then they are not found anywhere:

            
                        
            
                                    
              
                Chrome
                  87.0.4280.88
                Linux
                  
                                EasyEDA
                  6.4.14