Filtering Reports on Text Area (Long) fields
|Knowledge Article Number||000212391|
|Description||While it has become possible to filter our reports by values in Text Area (Long) format fields, there are some restrictions to keep in mind when doing so.|
|Resolution||Filters applied to standard Text Area (Long) fields (Description, etc.) only permit the first 1000 characters to be searched.
Filters applied to custom Text Area (Long) fields only permit the first 255 characters to be searched.
If the filtered value does not appear within the identified subset of characters identified above, the filter will return false.
Salesforce 1 Reporting Limits