That problem will be a bit more complex to solve, but when transferring from one level to another all data in the previous one is gone. To get around this you’ll have to create a save/load system that will save the widget text before swapping levels, then load it after you open level 1. An alternative if you’re just wanting set text to display on the widget would be to choose the text based on the level name (image attached).
I won’t be able to provide a save/load system since you’re going to want to customize it to your liking, but if you go that route there are plenty of tutorials on YouTube; however, it’s a bit difficult to understand when you’re new to UE4.