Lead Discovery: While performing a structure search, I see compounds that should not be included in the results

While performing a structure search in Lead Discovery, I see compounds that should not be included in the results.

This can be due to a mismatch of the index and can be fixed by using the following steps:

1. Clear the Structure Filter.
2. Add a Table plot, mark a row in it and delete the row.
3. Undo the delete operation which will recover the table.
4. Redo the filter. This will let LD to start to calculate the structure index.

This should resolve the incorrect structure index