Rubbery shredded chicken from an Instant Pot can happen for a few reasons. One common culprit is overcooking. Since the Instant Pot uses pressure to cook food quickly, it's possible to leave the chicken in for too long, resulting in overcooked and rubbery meat. You see, chicken breast tends to become tough and dry when it's cooked for too long. So, if you're using boneless, skinless chicken breasts, they might get rubbery if cooked for an extended period. Another factor could be the chicken's quality or thickness. If you're using low-quality chicken or very thin pieces, they can easily become overcooked and rubbery in the Instant Pot. Thinner cuts tend to cook faster, so it's essential to adjust the cooking time accordingly. It's always a good idea to check the internal temperature of the chicken with a meat thermometer to ensure it reaches the appropriate doneness (165°F or 74°C for chicken). To avoid rubbery shredded chicken, try reducing the cooking time slightly or using a natural release method instead of quick release to allow the pressure to release gradually. Also, consider using bone-in chicken or opting for chicken thighs instead of breasts since they tend to be more forgiving and result in juicier shredded meat. Experimenting with different cooking times and adjusting based on your preferences will help you achieve tender and delicious shredded chicken from your Instant Pot.