Unfortunately, it’s only a 50:50 chance. In the iFixit teardown (Step 5, photo 3), you can see the two 10x3 contact areas on the display module and the core module that need to establish a proper connection. If the problem reoccurs soon, the ideal approach would be if you were able to test another display module on your phone first (I’m aware this might be difficult to realize). If you don’t know any other FP3 owners nearby who might be willing to let you test their display module on your phone, have a look at
If you’re lucky, there is a Fairphone Angel in your area (although that doesn’t necessarily guarantee either they can make it possible).