Fw7 is beautiful. True, this is a great tool. You can use it to make very beautiful and fast apps (both regular web and mobile apps). However, integration in Wappler is simply not well implemented right now. However, I want to believe that the day will come when the integration of Fw7 in Wappler will reach the level of Bootstrap integration, and then we will all get an amazing tool for creating great projects.
I had to roll up my sleeves and figure it out myself.
This is a problem on the Wappler side!
The problem is that the HTML layout of navbar has changed since version 5 (I may be wrong, because I don't remember the exact version in which this happened).
The new HTML navbar layout uses a special tag to display the background:
<div class="navbar-bg"></div>
It is not generated by Wappler when the user inserts an element on the page. If you put it manually in the code, the problem will be solved.
Good one - yes we add this one when converting old Framework7 v4 to v5, but seems forgot to add it in the new inserts - will fix it in the next update.