@dharr 

I am using Maple2026 (I skipped Maple2025) and see this problem with Wayland (not with X11). When I put my cursor on "Recent Documents", a list appears to the right. But as soon as I move my cursor to the right, the window closes without giving me a chance to click. I have found that when the menu appears and instead of moving cursor to the right I move it up or down, I can make a selection from recent files after that (that is, the right menu does not disappear as it should...):

Please note that even though the left side shows "Open from cloud", these are really my local recent files.

Could you please confirm whether 2025.2 works fine for you with Wayland. If yes, this could be a regression for 2026 and I will open a ticket with Maplesoft. Or maybe you are using Maple 2025 on WIndows (I see the problem on Linux/Wayland only).

@WD0HHU 

I can see the same thing with Maple2026. This seems to be Wayland-specific; starting my session using X11 fixes the issue

@nm 

You can upgrade Nvidia drivers using https://www.nvidia.com/en-us/geforce/drivers/

Which goes for Java, I tend to agree with you - while Swing performance have been improved dramatically, there are some corner cases when GUI optimization has bugs. My PC is dual-boot (WIn 10 and Linux) and there are some GUI minor bugs that can be seen on Linux only. And they are definitely related to Java.

@C_R

If I move the mouse slowly over the disappeared toolbar icons, only those of them that are active (not grayed out) reappear. For example,  

the home button reappears but not backward/forward icons. Resizing Maple window triggers full redraw.

I can see the problem using your test even though it manifests itself a bit differently. I suspect this is something related to graphical subsystem optimization, maybe Nvidia-specific (I have rtx 2070). Some other tests:

• When I increase Maple window size by dragging the corner slowly,  the new area is black until I stop dragging and then shows the contents. If I increase/decrease the size dragging the corner continuously (slowly), it stays black until I stop.
• I do not see the problem starting any application, just those that use 3D-acceleration. 

The simplest way to duplicate the problem:

• start Maple, open a new empty worksheet (no need to run any code!)
• start Nvidia Geforce Experience program
• close Nvidia Geforce Experience

After that, the toolbar in Maple disappears:

If I resize the Maple window, the toolbar reappears again.

It is quite possible this is a Nvidia-driver specific problem. Your driver is rather old, I have the latest Studio driver 528.49.

Alex