When I moving a surface with my mouse middle button, a random text appears on the surface.
Video: Screencast
Browser: Firefox 146.0.1 (64-bit)
OS: Ubuntu 25.10
Edit:
Reloading a browser solves the problem, but the problem happens every time after text input,
for example, after modification the width property of a frame. Reloading tab doesn’t solves the problem.