To my knowledge, you're the first RPi4 1GB user here, so we only have experimental recommendations.
Going back to an older version will probably not solve the problem (you've already reduced the cache size without luck).
You said it works fine without WiFi, and obviously you don't want to create a swap file. Then try this:
Switch WiFi off, and buy a WiFi-to-Ethernet adapter: https://www.amazon.com/dp/B07Z1SGWL5
If SnapServer doesn't work, I don't get the point. MPD is the way to go. Read here to understand mpd.conf:
MPD has client/server architecture, and it should work with multiple clients. I haven't seen people using MPD that way, so you have to figure it out.
A 2GB swap file should do the trick. Be aware that you'll get a lot of read/write access on that swap file. So it might reduce lifetime of your storage device.
PS: Also read this thread to get the idea, how it works:
In other words, it only works on LE Generic-Legacy now:
With and without audio pass-through?
With and without fixed sample-rate?
if #4 doesn't work, you can also create a swap file to increase RAM:
Yes, the above link should work for RPi5, too. Eventually you have to use this add-on, instead of the standard version:
Bec as far as I can tell, it doesn't... the status bar doesn't seem to show the buffer during playback like it use to.
And that's a serious problem? If so, I can move this thread to bug reports.
PS: Just in case you didn't catched it: <memorysize> is a sub-tag of <cache>, so we talk about cache size, not RAM size.
1GB of cache is a lot on a video stream, so devs are surprised.
Yes. Don't use /storage/.config/system.d/wireguard.service, and write a start script at /storage(.config/autostart.sh instead. So you can use that script to check VPN connectivity before starting WireGuard.
Please check /storage/.cache/services/bluez.conf.
Feb 27 18:26:06.611084 LibreELEC systemd[1]: bluetooth-defaults.service was skipped because of an unmet condition check (ConditionPathExists=!/storage/.cache/services/bluez.conf).
Feb 27 18:26:06.630146 LibreELEC systemd[1]: Started bluetooth.service.
Feb 27 18:26:06.630668 LibreELEC systemd[1]: obex.service was skipped because of an unmet condition check (ConditionPathExists=/storage/.cache/services/obexd.conf).
Feb 27 18:26:06.631087 LibreELEC systemd[1]: Reached target bluetooth.target.
Feb 27 18:26:06.636231 LibreELEC (uetoothd)[596]: bluetooth.service: Referenced but unset environment variable evaluates to an empty string: BLUEZ_ARGS, BLUEZ_DEBUG
...
Sep 20 20:39:13.587846 LibreELEC bluetoothd[596]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to 54:15:89:45:56:78: Connection refused (111)Thanks. We need a complete log then...
Hmm, pretty much the same errors at both logs. I'm not familiar with NXP hardware. Search for cache settings (GUI or advancedsettings.xml), and increase values. Maybe the video needs too much cache with subtitles.
PS: Check whether the crash generates a kodi_crashlog_<TIMESTAMP>.log. If yes, upload it like here:
Update to LE 12.0.1. Older versions have an audio channel bug.