Draw text is applied to both image when append is used

[kiquetal]

const gm = require('gm').subClass({imageMagick: true});
var dir = __dirname + '/imgs'

gm(dir + '/original.png')
.append(dir + '/lost.png')
.append()
.fontSize(68)
.drawText(50, 50, "fancyText")
.write(dir + '/drawingResult.png', function(err){
if (err) return console.dir(arguments)
console.log(this.outname + ' created :: ' + arguments[3])
}
)
I want to apply drawText to only one image.