textarea height "jumping"

[optyler]

Hello,

I got a strange issue, with an elastic textarea, I link a gifv because I don't know how to explain this in english...

This is my haml/rails code

.form-group.message
  %textarea.message.form-control.msd-elastic{:name => "message", :placeholder => "Message...", :rows => "1", required: "true", "ng-model" => "body"}

And the css

textarea.message {
  min-height: 52px;
}

other styles are done with bootstrap.

• angular-elastic v2.5.1
• Google Chrome Version 61.0.3163.100