Toggle Filter in Grid View doesn't work anymore

Re 2) Didn’t fix it either. But the entries for filter presets are now redundant:

Re 3) I occasionally have 30+ file names in text filter but that was the very first thing I’ve cleared!

Create a new catalog and import several images. Then check.

If it’s work I would import all images ti the new catalog. Choose “File - Import from Another Catalog” Then select your old catalog to import. In the import dialog choose to import all photos, but do not move them.

Unfortunately it didn’t fix the problem, but now I’ve also lost all my preferences...

The problem still remains: when I open LR and go to any folder and press Cmd+L, a pop-up saying “Library Filters Off” appears although filters are already off. In the menu Library / Enable Filters is checked, the filter toolbar says “No Filter” and the padlock symbol is open. When I press Cmd+L again, the pop-up appears again and no filter is activated.

When I for example click on “Attribute” in the filter toolbar, the filter gets activated and works as expected, it says “Flagged” next to an open padlock symbol in the filter toolbar. When I press Cmd+L the filter gets deactivated and stays deactivated, whatever I do. I can’t toggle it.

For me it appears LR thinks filters are active and can’t deactivate them or clear any sort of internal state/flag for active filter.

This problem only appears in 1 out of 7 catalogs of mine. Unfortunately in my main business catalog. I’ve opened LrC with the Option key and tested integrity of the catalog in doubt. No errors founds, no difference in behavior. I’ve completed a catalog back with both options of testing integrity and optimizing enabled, no difference.

I’m out of ideas but really want this sorted - it’s a kind of minor function but which I use numerous times in my workflow.

Resetting anything is the last thing I want to do. This behaviour was introduced with the latest update to 15.2 so I don’t any settings be a problem here. 

System info is as follows:

Lightroom Classic version: 15.2 [ 202602111402-ec4112e8 ]
License: Creative Cloud
Language setting: en
Operating system: Mac OS 26
Version: 26.3.0 [25D125]
Application architecture: arm64
Logical processor count: 12
Processor speed: NA
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Built-in memory: 49.152,0 MB
Dedicated GPU memory used by Lightroom: 41,8MB / 38.338,5MB (0%)
Real memory available to Lightroom: 49.152,0 MB
Real memory used by Lightroom: 1.097,6 MB (2,2%)
Virtual memory used by Lightroom: 434.743,2 MB
Memory cache size: 0,0MB
Internal Camera Raw version: 18.2 [ 2482 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 0MB / 24575MB (0%)
Camera Raw real memory: 2MB / 49152MB (0%)

Cache1: 
NT- RAM:0,0MB, VRAM:0,0MB, Combined:0,0MB

Cache2: 
m:0,0MB, n:0,0MB

U-main: 128,0MB

Standard Preview Size: 2880 pixels
Displays: 1) 2560x1440

Graphics Processor Info: 
Metal: Apple M4 Pro
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Auto (S5_37)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/sfuertbauer/Kataloge/Business/Business.lrcat
Settings Folder: /Users/sfuertbauer/Library/Application Support/Adobe/Lightroom

Installed Plugins: 
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) Logi Plugin
5) picdrop FTP Upload

Config.lua flags: