Good day,

I recently got this exception when using ValidationTooltip on a UXTextbox with a custom Style.

In the sample project, I placed 2 UXTexbox controls, one with a custom style and the other without. The control without the style works without any problem and the ValidationTooltip is displayed, however, the control with the style don't.

The style was created using Edit Template -> Edit a Copy. In this sample I haven't modified the style.

When focus on control with the style, I get an exception on IsOpen property.

I have recorded a video showing the steps to reproduce the problem.

Since I was not able to upload mp4 files, I uploaded it to my dropbox (for a better quality, right click on the link below and save):

https://www.dropbox.com/s/qkvz23x0thqvn0r/UXTextbox_ValTooltip.mp4

Note: I've also tested with the UXPasswordBox and there's no problem with this control. However, I haven't tested with the remaining controls. So, please take into account the others.

Please, let me know if there's more information needed.

Regards,

Dave