It's normal for invert sugar syrup, when in it's (near) undiluted form, to crystallise to some degree over time, especially at cooler temperatures.
The solids will readily begin to dissolve in water or if the pouch is subject to warm temperatures.
You can either
- Stand the pouch in warm water (40°C/104°F) for a period of time to help aid the softening and redissolving, or
- Add some hot water to the pouch to aid in rinsing the solids out once the liquid portion has been transferred