Running this code shows TypeORM dropping the `someText` column and recreating it.

typeorm_drop_text.ts

import 'reflect-metadata'; // Required by TypeORM.
import { BaseEntity, Column, createConnection, Entity, PrimaryGeneratedColumn } from 'typeorm';

@Entity()
export class Bar extends BaseEntity {
    @PrimaryGeneratedColumn()
    public id!: number;

    @Column({
        type: 'text',
    })
    public someText!: string;
}

createConnection({
    database: 'REDACTED',
    entities: [Bar],
    host: 'REDACTED',
    logging: true,
    password: 'REDACTED',
    port: 3306,
    synchronize: true,
    type: 'mysql',
    username: 'REDACTED'
}).then((connection) => {
    console.log('Connected', connection.isConnected);
    process.exit(0);
});