Thank you. I think we found the bug in the filter function. Please try to replace it with this custom method until this is fixed on our end.

HTML:

      <table
        class="table datatable-table"
        mdbTable
        [filterFn]="customFilter"
      >...</table>

TS:

  customFilter(data: Person, searchTerm: string): boolean {
    return Object.keys(data).some((key: any) => {
      if (data[key]) {
        return data[key].toString().toLowerCase().includes(searchTerm.toLowerCase());
      }
    });
  }

This is more or less copy paste from the documentation. Use the word 'office' as an example of the problem because Jena Gaines is an "Office Manager" but "Office" is also a column header.

HTML

<div class="container mt-4">
    <mdb-form-control>
        <input mdbInput type="text" class="form-control" id="search-input" (keyup)="search($event)" />
        <label mdbLabel class="form-label" for="search-input">Search</label>
    </mdb-form-control>
    <div class="datatable">
        <table class="table datatable-table" mdbTable mdbTableSort #table="mdbTable" #sort="mdbTableSort"
            [dataSource]="dataSource" [pagination]="pagination" [sort]="sort">
            <thead class="datatable-header">
                <tr>
                    <th *ngFor="let header of headers" [mdbTableSortHeader]="header" scope="col">
                        {{ header | titlecase }}
                    </th>
                </tr>
            </thead>
            <tbody class="datatable-body">
                <tr *ngFor="let data of table.data" scope="row">
                    <td>
                        {{ data.name }}
                    </td>
                    <td>
                        {{ data.position }}
                    </td>
                    <td>
                        {{ data.office }}
                    </td>
                    <td>
                        {{ data.age }}
                    </td>
                    <td>
                        {{ data.startDate }}
                    </td>
                    <td>
                        {{ data.salary }}
                    </td>
                </tr>
            </tbody>
        </table>
        <mdb-table-pagination #pagination></mdb-table-pagination>
    </div>
</div>

TS

import { Component, ViewChild } from '@angular/core';
import { MdbTableDirective } from 'mdb-angular-ui-kit/table';

export interface Person {
    name: string;
    position: string;
    office: string;
    age: number;
    startDate: string;
    salary: string;
}

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.scss']
})
export class AppComponent {
    @ViewChild('table') searchTable: MdbTableDirective<Person>;

    title = 'mdb-angular-ui-kit-pro-essential';
    constructor() { }

    headers = ['Name', 'Position', 'Office', 'Age', 'Start Date', 'Salary'];

    dataSource: Person[] = [
        {
            name: 'Tiger Nixon',
            position: 'System Architect',
            office: 'Edinburgh',
            age: 61,
            startDate: '2011/04/25',
            salary: '$320,800',
        },
        {
            name: 'Sonya Frost',
            position: 'Software Engineer',
            office: 'Edinburgh',
            age: 23,
            startDate: '2008/12/13',
            salary: '$103,600',
        },
        {
            name: 'Jena Gaines',
            position: 'Office Manager',
            office: 'London',
            age: 30,
            startDate: '2008/12/19',
            salary: '$90,560',
        },
        {
            name: 'Quinn Flynn',
            position: 'Support Lead',
            office: 'Edinburgh',
            age: 22,
            startDate: '2013/03/03',
            salary: '$342,000',
        },
        {
            name: 'Charde Marshall',
            position: 'Regional Director',
            office: 'San Francisco',
            age: 36,
            startDate: '2008/10/16',
            salary: '$470,600',
        },

    ];

    search(event: Event): void {
        const searchTerm = (event.target as HTMLInputElement).value;
        this.searchTable.search(searchTerm);
    }
}