Changes in Angular 6.1.5 Pro crashes browser

I'm not sure what changed in the Angular Pro version between 6.1.3 & 6.1.5, but I'm seeing my browser (Chrome 67.0.3396.99 64-bit) hang indefinitely when using 6.1.5 vs 6.1.3.  I have to kill it and restart to be able to use it again.  I've downgraded to 6.1.3 just to make progress for now.   It appears to be something around forms.  I'm not seeing any browser console log errors and there's nothing showing up in my terminal.  I've included the offending snippet of code below <form [formGroup]="loginForm"> <divclass="md-form"> <input id="email" type="text" mdbInputDirective class="form-control" data-success=" " data-error="not a valid email address" formControlName="email" > <labelfor="email">Email Address</label> </div> <divclass="md-form"> <input id="password" type="password" mdbInputDirective class="form-control" data-success=" " data-error="must be at least 6 characters" formControlName="password" > <labelfor="password">Password</label> </div> </form> import { Component } from '@angular/core'; import { FormGroup, Validators, FormBuilder } from '@angular/forms'; @Component({ selector:'tak-login-form', templateUrl:'./login-form.component.html' }) export class LoginFormComponent { loginForm:FormGroup; constructor(privatefb:FormBuilder) { this.loginForm=fb.group({ 'email': [null, [ Validators.required, Validators.email ]], 'password': [null, [ Validators.required, Validators.minLength(6) ]] }); } } import { NgModule } from '@angular/core'; import { CommonModule } from '@angular/common'; import { FormsModule, ReactiveFormsModule } from '@angular/forms'; import { LoginComponent } from './login.component'; import { LoginFormComponent } from './login-form/login-form.component'; import { InputsModule, WavesModule } from 'ng-uikit-pro-standard'; @NgModule({ imports: [ CommonModule, FormsModule, ReactiveFormsModule, InputsModule, WavesModule ], exports: [ LoginComponent ], declarations: [ LoginComponent, LoginFormComponent ] }) export class LoginModule { }

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