GTN 750 load Failure After X-Plane 12.4.3 update

[Flying Squirrel]

Hi,
I’m having repeatable crashes and blank windows when trying to pop out the TDS GTNXi 750 in X‑Plane and move it to a second monitor.
System and versions

• Windows 11 (fully updated)
  
• X‑Plane 12.4.3 / 12.4.4, Vulkan with Zink
  
• GPU: NVIDIA RTX 5070 Ti, both monitors connected to this card
  
• TDS GPS Manager 1.0.1.8
  
• GTNXi PC Trainer: 20.42.2.0
  
• X‑Plane 12 GTNXi: 1.0.1.4
  
• Aviation Trainer: 3.10.3.0
  

What I’m trying to do

• Load X‑Plane 12.4.x, default aircraft with GTNXi integration.
  
• Use the TDS plugin in X‑Plane to pop out the GTN 750 window.
  
• Drag that popped‑out GTN to my secondary monitor so I can use it there.
  

Problem / symptoms

• When I pop out the GTN 750, X‑Plane spawns what looks like a second GTN window.
  
• The front window is blank (no GTN display).
  
• There appears to be another GTN window “behind” it that is actually working, but it’s completely covered by the blank one, so I can’t interact with it.
  
• If I try to move this setup to the second monitor, X‑Plane soon crashes.
  
• This happens whether I use the plugin menu pop‑out or the assigned keybind to toggle the pop‑up.
  

What I’ve already tried

• Confirmed both monitors are on the same GPU (no iGPU outputs).
  
• Ran X‑Plane in windowed mode and also tried changing graphics settings (turning Zink off, lowering textures/MSAA).
  
• Disabled other plugins to test with only TDS and default Laminar content.
  
• Confirmed that in at the end, consistent with a graphics/device loss when using custom avionic pop‑outs.
  
• There is no explicit “plugin X caused this crash” line; it looks like a graphics/device crash while the GTN pop‑out is active.
  

Question / request

• Is this a known issue with the current X‑Plane GTNXi build (custom avionic device pop‑outs on multi‑monitor setups)?
  
• Is there a recommended way to run the GTN in a standalone/external window on a second monitor for X‑Plane (similar to how you advise MSFS users), or a beta/hotfix that addresses blank GTN pop‑ups and crashes when moved between monitors?
  
• Thanks in advance for any guidance. I’d really like to use the GTN 750 on my second monitor with X‑Plane 12, but right now the pop‑out behavior is unusable because of the blank window and crash.
  
• I've included my Log.txt
  

[adminOwner2]

Hello,

What you are describing is very odd behavior and it is indicative of a localized issue, we have never encountered such issues, as well as version 1.0.1.4 being very stable.

Are you running VR?

According to the log file of X-Plane that you have provided, the crash is related to X-Plane itself, so we would strongly advise to file an official X-Plane bug report with the a log/crash report details so it would help the LR team.

From the TDS end, in order to assess if this is anything from our end, please provide us with screenshots of what has been stated above "What I'm trying to do".
Especially "When I pop out the GTN 750, X‑Plane spawns what looks like a second GTN window."

In X-Plane, as long as you pop-out a window, it becomes a regular Windows window, so this is the recommended way to handle this.

An alternative for pop-ups, as part of the custom avionics devices, is to use the X-Plane Settings/Graphics, Monitor Usage, select TDS GTN 750XI Unit 1 on the desired monitor. This is a new X-Plane feature, which had some bugs that we have reported