Really strange, for me ”ieftină” sounds correctly, maybe you are in a test grup for a new TTS ?!
When you have doubts, you can compare with a better pronunciation here: https://www.readspeaker.com/text-to-speech-demo/, choosing Romanian and typing the sentence in question. If you collected a list with improbable pronunciations, please share it with us, it may be helpful for testing another TTS provider. Thank you.