Change the Multi-Bar Rests value in Score Settings>Layout, or if you work in Cubase 11 or 12, click the multi-bar rest symbol and modify the Consolidate value in the Right Zone to get the desired result.
In your case set that value to 3.
Thanks for the reply! I tried what you said but it’s not working. Its like the last bar is bugged or something. I delete all the info in it to make sure there is nothing hidden but it never merges with the other 3 no matter what.