I’ve noticed since a few weeks, not sure, but perhaps since the 2025.1 update, that loading the web UI has become quite slow. At the same time though, it has always been slow, but there’s a new level of slowness added, it feels like.
When I navigate my browser to the correct URL, it’s just sitting there, waiting for the first reply from the server. It’s loading literally 0 bytes of HTML for the first ~4 seconds or so. Then it displays this “Loading data” screen for another ~4 seconds.
I really don’t think I have an all-too-crazy setup (yet), so I fear it’ll only get worse as I build out my smart home further.
But more to the point, in order to diagnose what’s causing this (assuming it’s abnormal - and it seems that way to me) what could be some of the causes for both cases?
For reference, I’m running HA core 2025.1.2 on Supervisor 2024.12.3 on HA OS 14.1. It says it’s up-to-date. It’s installed in what I feel is a very generously specced VM on Unraid, running on hardware that is otherwise idling away for the most part. Point being, hardware is unlikely to be the problem.
Yeah, and sometimes it’s fast and it manages to even skip the “loading data” part.
Can somebody please explain what it’s actually doing during both these loading sequences? I feel like 4 seconds in both cases is a long time for what it seemingly is. 4 seconds, even on old 100Mb ethernet, is still 40MB of data, and I have 2.5Gb ethernet.
So, like, what’s the next step? Should I create a bug over at the github side of things, or what do I do to get the devs’ attention? Because I feel this issue is getting oversnowed by loads of other questions and support, whereas this is likely an actual bug.
Also after a while this popup “Connection lost. Reconnecting…”
The fact that it cannot maintain a connection to the server is one, but another is that it takes so long to establish a new connection. I honestly think something is wrong. It cannot have gotten through testing at this kind of performance, surely.
This has just begun for me too. I can’t even tell you what versions it is because I can’t log in! It loads forever, then the TCP stack itself eventually times out.
It simply stopped working. Back in January (?) it worked fine - meanwhile, it loads endlessly and times out. I’m sad as I subscribed because I wanted to remotely do stuff when I’m not at home. Although I also subscribed to simply support the HA project itself, I feel a bit ripped off.
Same here, particular UI components will literally freeze.
In iOS this causes the app to crash. But it’s not platform specific, the freezing happens on my mac m4 as well. Apparently the UI is that demanding that a macbook pro m4 max can’t handle it?
Same issue here. Both using the Android app and the browser. Loading takes anything between 5 and 15 seconds, since maybe 6 months. I’m using HA since around 2 years and loading times were not a problem before that. I’ve tried disabling all add-ons and cleaning all logs, but nothing seems to have any impact on loading times.
Regarding this issue if you are using Safari it is resolved by accessing HA via a URL instead of the IP address eg homeassistant.local or by using another browser eg Chrome.
seems serious trouble, and yet posting here wont fix it, eventhough others might recognize and +1
If the backend still works properly, and shows no errors in the log, you’d best open an issue in the Frontend repo, and add Inspector errors/warnings there, so devs can check whats happening.
Also, test in safe mode, to exclude custom stuff from interfering, its what devs require you to do in these cases
I would like to share how I regained the speed of my Frontend.
After trying various options, it seems that this morning my system is back to normal.
My procedure consisted of starting/stopping each add-ons.
Dnsmasq
DuckDns
FileE-editor
MariadB
Mosquitto
Zigbee2MQTT
MQTT service
Advanced SSH & Web Terminal
MariaDB caused me some troubles because stopping it crashed my Home Assistant.
After two reboots, I recovered my system and, miraculously, it became fluid.
Back at this in 2026, as I still had the unusable UI in Safari. After some hunting around, ‘mini-graph-card’ via HACS was suggested as a problem. I deleted it. UI is now fine in Safari
