When running the Enrich Layer tool on a multiple buffer layer created from the same point but with different radii, the number of features in the enriched layer attribute table is lower than the number of features in the buffer layer attribute table, as shown below.
Disk buffer layer attribute table
Enriched disk buffer layer attribute table
This issue occurs when the multiple disk buffer type is selected instead of the multiple ring buffer type when creating the buffer layer. Multiple disk buffers contain overlapping buffered geometry features. Therefore, the output is the cumulative results from the smaller radius level buffers. Only true features are enriched while the overlapping buffered geometry features are not, therefore the features are not included in the attribute table.
Unlike the multiple disk buffer layer, the multiple ring buffer layer does not include overlapping buffered geometry features. Due to this, the accumulative results fail to display in the enriched layer, as shown in the attribute tables below.
Ring buffer layer attribute table:
Enriched ring buffer layer attribute table: