My Transform Axis Disappeared in 4.19

My bp based project are fine in 4.17, crashed in 4.18, and I try to fix it in 4.19.
Now a few situations I find:

  1. In my project, the Transform Axis disappeared in the viewport, no matter how I set it(e.g. all set to Defaults);
  2. In my project, all the Nav Mesh Bounds Volume frame are disappeared in the viewport, no matter how I set it(e.g. all set to Defaults);
  3. I open a new project, the Axis, and Nav Volume are normal.

Because I use some new features in 4.18(e.g. ImgMediaSource), so I can’t make everything back to 4.17(most BP note are no
incompatible between 4.17 and 4.18)

So I try to ask here, is there any solution?

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks