Power Loader Lora unresponsive

[sandrosem]

im on comfyui 0.24.0 and powerloader lora is really unresponsive. values do not update when changed, value arrows don't work, loras cannot be switched off or on. only works when adding a new lora....

[KSPUNK]

I'm facing almost the same problem. When I click ▶ button to change strength, nothing happens at all.
I first noticed this issue around version 0.20.
Updating rgthree-comfy to latest version did not resolve issue.

[PlayanGaems]

Since the latest ComfyUI update I haven't been able to get the Power Lora Loader to work either.

[wtf74520]

i have the same problem,only works when add a new lora, or reload the ui by switch to node2.0 then switch it back

[lxkcyht]

I have the same problem,and sometimes power Lora loader shows blank page.My comfyui 0.26.0

[vikart-lab]

Been having the same problem off and on over the last few weeks and I think I've found a workaround here - first post here ever and I just now made the account solely because of this lol.

If you right-click and check the power loader "properties", the top option of "show strength" has a dropdown box with 2 options. Swap to the 2nd option of "Separate Model & Clip" and (as far as I can tell) voila, strength control functions again.

There is the small caveat of (presumably) having to adjust the clip strength to match any changes you make to the model strength. Maybe there are benefits to messing around with model and clip strength separately, I honestly have no idea, could be worth experimenting with. But yea, with matching the strengths between the two, node functionality appears to return with this change.

Hope this works for you guys and anyone else experiencing the same thing!

[MarcBate]

I dug into this — the root cause is in the ComfyUI frontend (comfyui-frontend-package, seen on 1.45.x), not rgthree, though it's easy to patch on the rgthree side.

What happens

The frontend hosts legacy canvas widgets in a Vue component (WidgetLegacy, in the dialogService-* chunk). Its draw() does roughly:

s.y = 0;
s.width = e;   // e = the Vue host's clientWidth, not the node width

i.e. it writes its own host width onto the shared widget instance. LiteGraph's LGraphNode.getWidgetOnPos then hit-tests with e.width || nodeWidth. So once that host binds to a row (which happens after the first interaction / selection), widget.width gets clobbered to a small value and the row's clickable region collapses to a narrow strip. That's why the first click on the strength number works, but every subsequent click — number and the < > arrows — lands on dead space.

The Nodes-2.0 symptom in this thread ("arrows change the value but the UI doesn't update") is the same component: it only repaints on a widget's callback, and the Power Lora Loader widgets mutate value directly rather than via callback, so the number changes internally but the canvas never redraws.

Workaround / fix

Two small changes to RgthreeBaseWidget fix both halves:

1. Guard width so the external write is ignored (these widgets always draw at node width anyway):

Object.defineProperty(this, "width", {
  configurable: true,
  get: () => undefined,
  set: () => {},
});

2. After any direct value mutation (stepStrength, drag, the prompt callback, toggles, lora select), call the host's repaint hook + mark the canvas dirty:

triggerRedraw(node) {
  this.triggerDraw?.();               // hook the Vue host installs on the widget
  node?.setDirtyCanvas(true, false);
  app.canvas?.setDirty(true, false);
}

With both applied, repeated arrow clicks and the value dialog work every time, and the value stays in sync with Nodes 2.0 enabled.

The "proper" fix probably belongs in ComfyUI_frontend — WidgetLegacy.draw() should save/restore widget.width/widget.y around its draw instead of overwriting them on the shared instance.

Frontend version tested: comfyui-frontend-package==1.45.20.

[MarcBate]

For anyone who wants the fix now, I've put the patched files in a gist:

https://gist.github.com/MarcBate/36642cebe01bca205ef174d955dc497c

Quick version: ComfyUI serves the compiled files, so you only need the two .js files. Back up the originals, then copy over:

Gist file	Destination (relative to custom_nodes/rgthree-comfy/)
utils_widgets.js	web/comfyui/utils_widgets.js
power_lora_loader.js	web/comfyui/power_lora_loader.js

Then restart ComfyUI and hard-refresh the browser (Ctrl/Cmd+Shift+R).

The gist also includes the two src_web/comfyui/*.ts sources (only needed if you build from source) and a .patch you can git apply from inside the rgthree-comfy/ folder.

Made against rgthree-comfy 27b4f4c / comfyui-frontend-package==1.45.20. Note this patches rgthree's own output, so a future rgthree update will overwrite it — ideally the real fix lands upstream in ComfyUI_frontend.