Install fails on Plasma ISO

yacn

Hardware: Dell XPS 13 9300 2020 Developer Edition

Yesterday when I was trying to install the Plasma spin to my drive, I was having really weird seemingly graphical glitches after the system loading, stuff like the background not loading, the system tray at the bottom swapping between being right next to the application menu and then all the way to the right where it's supposed to be. It was like 20% usable since I could open the application menu and launch an app by typing it's name and pressing enter, though text never showed up, though the terminal i launched seemed to work normally. Happened on multiple flash drives and the downloaded ISO passed checksums. Anyways, I made a new flash drive last night (only difference being I used pv Solus-4.1-Plasma.iso > /dev/<flashdrive> instead of dd) and was prepared to post a video showing the weird issues I was seeing but when I booted that drive up, the desktop loaded like it should normally and things seemed to be working out well.

So I tried to go through the installation, I got all the way to the end and pressed Install but was then presented with this error immediately afterwards:

Installation has failed, and changes were made to disk.
The installer will now exit.

Failed to apply format: /dev/nvme0n1p2: Command 'mkswap /dev/-nvme0n1p2' returned non-zero exit status 1
Failed to apply disk strategy

(yes, there is a - in the mkswap command, I thought it was weird too)

I saw the same error before when I tried to forcefully install the Plasma ISO in it's wonky state (thinking I would just update afterwards to the newest kernel and maybe things would be working) by launching the installer from the application menu like I did terminal.

Anyways, after rebooting my disk is predictably FUBAR'd.

Additional context of stuff I tried out yesterday

Solus Budgie ISO doesn't have these issues
Solus GNOME ISO doesn't have these issues
Kubuntu 20.04 live ISO boots/installs without issue
KDE Neon live ISO fails to boot (stuck at black screen w/ cursor in top left corner and my vendors boot splash logo for some reason)

yacn

Did some searching and solved my install issue via the info from these links:

Seems the live iso's are automatically mounting the existing LVM volume meaning I need to go unmount/deactivate them through the KDE partition manager.

Unfortunately, even after installing and updating to latest kernel / packages, I still had the flickering task bar issue so I'm back to the Budgie release.

yacn

For what it's worth, I resolved/worked around the flickering by removing the package xorg-driver-video-intel after install, seems there's some issue between it and Qt.