Created attachment 132588 [details]
Video showing inconsistent tab sliding

SUMMARY
When moving between tabs in the application launcher, the direction from which the tabs slide in are inconsistent. See the attached video.


STEPS TO REPRODUCE
1. Open the application launcher.
2. Move from the first tab (‘Favourites’) to the second tab (‘Recently used’).
3. Continue to move to the right, to the next tab(s) until you reach the last (fifth) tab (‘Leave’).
4. Move back to the previous tabs until you reach the first tab again.

OBSERVED RESULT
See the attached video. But here’s a text description:
From left to right (steps 2–3):
When you move from tab 1 to tab 2, the view slides in from the RIGHT.
When you move from tab 2 to tab 3, the view slides in from the LEFT.
When you move from tab 3 to tab 4, the view slides in from the RIGHT.
When you move from tab 4 to tab 5, the view slides in from the RIGHT.

From right to left (step 4):
When you move from tab 5 to tab 4, the view slides in from the LEFT.
When you move from tab 4 to tab 3, the view slides in from the LEFT.
When you move from tab 3 to tab 2, the view slides in from the RIGHT.
When you move from tab 2 to tab 1, the view slides in from the LEFT.

EXPECTED RESULT
When moving from tab x to tab x + 1 (i.e., from left to right), the view should slide in from the RIGHT for all x.
When moving from tab x + 1 to tab x, the view should slide in from the LEFT for all x.

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20201014
KDE Plasma Version: 5.20.0
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Kernel Version: 5.8.14-1-default
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-2500 CPU @ 3.30GHz
Memory: 15.6 GiB of RAM
Graphics Processor: GeForce GTX 1060 3GB/PCIe/SSE2