Do you have more specifics? I just tried it on my machine (Fedora 42, Plasma 6.5.1 Wayland, Konsole 25.08.2, Radeon 780M) and it seems fine for me. Does it only occur occasionally/under specific circumstances for example?
I've never seen similar issues using a variety of terminals on Gnome, Sway, or Niri. Haven't used Konsole or Plasma, but I wonder if it's maybe a driver issue?
For example, terminal transparency using Konsole on KDE flickers for me.
Its nearly there, but not quite. Maybe Gnome has no such issues?