“Embroidered garments need to be washed very carefully in accordance with the correct technique, otherwise, you can ruin the embroidery and ruin your entire dress.

I can advise you a blog:
how to wash embroidered clothing

I think after reading it you will find the answer to your question. This type of sewing must be handled very gently in the wash, both by hand and in the washing machine. I myself have a lot of embroidered clothes, I wear them almost every day, somewhere my first sweatshirt just deteriorated due to improper washing, but then I learned to wash correctly and now everything is fine. I think this blog will help you. The main thing is to do everything according to the instructions and instructions that are given there.”