Virtual table queries are limited to return 250 records. If you've a 1:N or N custom multi-table (polymorphic) relationship with a virtual table, any query exceeding this limit will fail and provide an error.

This is preventing the filtering of data in views when opening virtual entities in the CRM. For example, it is impossible to filter with the "Contains" filter. Which can be very annoying for a daily use of the Virtual Entities in CRM.