It's back: 

$ ubuntu-desktop-bootstrap --try-or-install

(ubuntu_bootstrap:7450): Gtk-WARNING **: 04:13:54.764: /usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/immodules/im-ibus.so: undefined symbol: ibus_input_context_set_post_process_key_event

(ubuntu_bootstrap:7450): Gtk-WARNING **: 04:13:54.764: Loading IM context type 'ibus' failed
flutter: INFO ubuntu_bootstrap: Logging to /var/log/installer/ubuntu_bootstrap.log
flutter: WARNING subiquity_server: Unable to find the subiquity_client package. Falling back to the current working dir: /home/edubuntu
flutter: INFO subiquity_server: Waiting server up to 90 seconds
flutter: INFO subiquity_server: ApplicationState.WAITING
flutter: DEBUG config: Loaded config file from /usr/share/desktop-provision/whitelabel.yaml
flutter: INFO flavor_provider: Using flavor from config: UbuntuFlavor.edubuntu
flutter: INFO subiquity_client: Opening socket to Endpoint(/run/subiquity/socket )
flutter: DEBUG desktop: Disabling automounting
flutter: DEBUG subiquity_client: POST http://localhost/meta/client_variant?variant=%22desktop%22
flutter: DEBUG subiquity_client: GET http://localhost/refresh?wait=true
flutter: DEBUG telemetry: Writing report to /var/log/installer/telemetry
flutter: DEBUG subiquity_client: ==> setVariant(Variant.DESKTOP) null
flutter: DEBUG subiquity_client: ==> checkRefresh() {"availability": "UNAVAILABLE", "current_snap_version": "0+git.a0db5e7c", "new_snap_version": ""}
flutter: DEBUG refresh: RefreshState.status(status: RefreshStatus(availability: RefreshCheckState.UNAVAILABLE, currentSnapVersion: 0+git.a0db5e7c, newSnapVersion: ))
flutter: INFO subiquity_status: null => ApplicationStatus(state: ApplicationState.WAITING, confirmingTty: , error: null, cloudInitOk: true, interactive: true, echoSyslogId: subiquity_echo.5918, logSyslogId: subiquity_log.5918, eventSyslogId: subiquity_event.5918)
flutter: DEBUG subiquity_client: POST http://localhost/meta/mark_configured?endpoint_names=%5B%22mirror%22%2C%22proxy%22%2C%22ssh%22%2C%22snaplist%22%2C%22ubuntu_pro%22%5D
flutter: DEBUG subiquity_client: ==> markConfigured([mirror, proxy, ssh, snaplist, ubuntu_pro]) null
flutter: DEBUG desktop: Disabling screen blanking
flutter: DEBUG desktop: Disabling screensaver
flutter: DEBUG desktop: Inhibiting Gnome session
flutter: INFO subiquity_status: null => ApplicationStatus(state: ApplicationState.WAITING, confirmingTty: , error: null, cloudInitOk: true, interactive: true, echoSyslogId: subiquity_echo.5918, logSyslogId: subiquity_log.5918, eventSyslogId: subiquity_event.5918)
flutter: INFO subiquity_status: null => ApplicationStatus(state: ApplicationState.WAITING, confirmingTty: , error: null, cloudInitOk: true, interactive: true, echoSyslogId: subiquity_echo.5918, logSyslogId: subiquity_log.5918, eventSyslogId: subiquity_event.5918)
flutter: DEBUG subiquity_client: GET http://localhost/meta/interactive_sections
flutter: DEBUG subiquity_client: ==> getInteractiveSections() null
flutter: INFO locale: Loaded 75 languages
flutter: DEBUG subiquity_client: GET http://localhost/locale
flutter: DEBUG subiquity_client: ==> locale() "C.UTF-8"
flutter: INFO locale: Selected en_US as UI language

Telltale sign is error appearing in the cloudInitOk check, but this might not be true. Could also be subiquity?

Also this: 

○ cloud-init.service - Initial cloud-init job (metadata service crawler)
     Loaded: loaded (/usr/lib/systemd/system/cloud-init.service; enabled; preset: enabled)
     Active: inactive (dead)

I'm fairly certain that means our nasty cloud-init bug is back.

Using either of these, it doesn't matter:

latest/stable:    0+git.1314d48d 2024-03-19 (63) 119MB classic
latest/candidate: 0+git.a0db5e7c 2024-03-20 (65) 119MB classic