Elimine el contorno de los campos de entrada y entrada de bootstrap
input {
border: 1;
outline: none;
}
Enchanting Eland
input {
border: 1;
outline: none;
}<div class="form-label-group">
<input type="password" id="inputPassword" class="form-control shadow-none" placeholder="Password" required>
<label for="inputPassword">Password</label>
</div>