This is patched afaik, but if you find that it’s still happening you should open a BR.
You don’t have to use konsole, imo konsole is not the best Terminal out there.
sure, I guess you’re right, seems silly to discard Plasma as a whole because one app is acting out, but I like the whole concept of getting everything and the kitchen sink and not installing alternatives and thus polluting the experience.
I’ve seen a closed bug report that’s been active for years claiming it’s fixed, but that’s blatantly false.
I’m not taking about some tweaking and burning the default config - install latest debian or fedora or manjaro, the DE automatically switches to e.g. 125% and there’s the dancing stuff in every konsole window I open, on every laptop I’ve tried it.
This One? if you look at the bottom you can see a plethora of patches. Still, if it’s continuing to be a problem for you, you must report it with the appropriate information if you want it to get patched.
This bug clearly doesn’t effect that many users, and some have reported it’s fixed for them.
So it’s important you make some noise.