Application Launcher not responsive in certain regions on cursor hover

[RejZoR]

I’ve noticed Application Launcher is not responsive when hovering across categories, but only across certain regions of it.

Example (replace xx with tt coz of links not being allowed but I need to show an image):
hxxps://imgur.com/a/ev8lC9Z

When moving mouse up and down across red region, the highlight follows cursor instantly and does so without exception every single time and stuff on right side (actual apps within that category) refresh instantly. If I hover mouse across blue region, I sometimes pass 3 categories and highlight is stuck in one place and then jumps to cursor position on 4th category. It seems pretty random, but behavior seems quite consistent by not refreshing highlight as I’m moving cursor across categories.

Anyone else experiencing similar behavior? It’s oddly specific issue, but I noticed red and blue region has a consistently different behavior on same system. Running latest fully updated Manjaro KDE on Ryzen 2500U, 8GB RAM, 256GB SSD laptop.

[Aragorn]

@RejZoR

When moving mouse up and down across red region, the highlight follows cursor instantly and does so without exception every single time and stuff on right side (actual apps within that category) refresh instantly. If I hover mouse across blue region, I sometimes pass 3 categories and highlight is stuck in one place and then jumps to cursor position on 4th category. It seems pretty random, but behavior seems quite consistent by not refreshing highlight as I’m moving cursor across categories.

It’s an old KDE “bug” ─ not really a bug, but more like a performance issue ─ that has been around for ages already, across distributions. It was supposed to have been fixed, but then again, so were supposedly a number of other bugs that have recently returned.

Personally I don’t use the application launcher menu ─ I use the Application Dashboard instead.

[Fabby]

@RejZoR

Example (replace xx with tt coz of links not being allowed but I need to show an image):
hxxps://imgur.com/a/ev8lC9Z

For the future, please read this:

[HowTo] post screenshots and links

Difficulty: ★☆☆☆☆ You’ve probably been sent here by a more experienced user because you cannot post links nor screenshots so please follow the simple instructions of this tutorial below to allow you to post both screenshots and links in any post and have a short explanation of why you can’t do this easily… If you’re reading this in response to a question, please click the green link above this text to bring you to the full unabridged text of the tutorial itself. If you …

For now, I’ve marked this answer as the solution to your question as it is by far the best answer you’ll get.

Application Launcher not responsive in certain regions on cursor hover

It’s an old KDE “bug” ─ not really a bug, but more like a performance issue ─ that has been around for ages already, across distributions. It was supposed to have been fixed, but then again, so were supposedly a number of other bugs that have recently returned. Personally I don’t use the application launcher menu ─ I use the Application Dashboard instead. [2021.09.07_21:48_-_Application_Dashboard]

However, if you disagree with my choice, please feel free to take any other answer as the solution to your question or even remove the solution altogether: You are in control! (If you disagree with my choice, just send me a personal message and explain why I shouldn’t have done this or or if you agree)

P.S. In the future, please don’t forget to come back to your question after your issue has been solved and click the 3 dots below the answer to mark a solution like this below the answer that helped you most:

so that the next person that has the exact same problem you just had will benefit from your post as well as your question will now be in the “solved” status.