Issues with Lightroom Classic 15.4.1 since update

Since the recent updates I have intermittently experienced a number of issues when using Lightroom Classic 15.4.1 on a Windows 11 PC (System info below):

1. program crashed on one or two occasions;
2. program switches from Develop to Library mode by itself; 
3. clipping indicators show in green rather than red; 
4. ‘Before’ image does not appear when selecting Before / After;
5. Masking fails to find landscape features, subject or object and pop-out closes;
6. Adaptive colour profile does not work.

None of these issues were present before the update, and I tried the masking in Lightroom (desktop) without problems on an image where LR Classic failed to find the subject or landscape features. I have tried switching between ‘use graphics processor’ and ‘off’ but it does not seem to make a consistent difference - sometimes things work as expected, the next time they don’t.

Lightroom Classic version: 15.4.1 [ 202606201310-b9f148a4 ]
License: Creative Cloud
Language setting: en
Operating system: Windows 11 - Business Edition
Version: 11.0.26200
Application architecture: x64
System architecture: x64
Logical processor count: 24
Processor speed: 3.7GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.213

CPU Utilisation: 4.0%
Power Source: Plugged In
Built-in memory: 32670.9 MB
Dedicated GPU memory used by Lightroom: 4381.9MB / 12118.0MB (36%)
Real memory available to Lightroom: 32670.9 MB
Real memory used by Lightroom: 4453.4 MB (13.6%)
Virtual memory used by Lightroom: 8874.2 MB
GDI objects count: 829
USER objects count: 3166
Process handles count: 4317
Memory cache size: 2742.8MB
Internal Camera Raw version: 18.4 [ 2608 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1003MB / 16335MB (6%)
Camera Raw real memory: 1065MB / 32670MB (3%)

Cache1: 
Final1- RAM:790.0MB, VRAM:2623.0MB, NZ8_0323.NEF
NT- RAM:790.0MB, VRAM:2623.0MB, Combined:3413.0MB

Cache2: 
m:2742.8MB, n:352.2MB

U-main: 93.0MB

System DPI setting: 144 DPI (high DPI mode)
Desktop composition enabled: Yes
Standard Preview Size: 1440 pixels
Displays: 1) 3840x2160
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info: 
DirectX: Intel(R) Arc(TM) B580 Graphics (32.0.101.8861)
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S5_11)

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic
Library Path: I:\Lightroom\Lightroom Catalog-v13-3.lrcat
Settings Folder: C:\Users\Peter\AppData\Roaming\Adobe\Lightroom

Installed Plugins: 
1) AdobeStock
2) Aurora HDR 2018
3) ColorChecker Passport
4) HDR Efex Pro 2
5) ON1 Effects 2025
6) ON1 NoNoise AI 2024
7) ON1 Photo RAW 2020
8) ON1 Photo RAW 2025
9) ON1 Resize 2020
10) Topaz Photo AI

Config.lua flags: 
Adapter #1: Vendor : 8086
    Device : e20b
    Subsystem : 4215172f
    Revision : 0
    Video Memory : 12118
Adapter #2: Vendor : 1414
    Device : 8c
    Subsystem : 0
    Revision : 0
    Video Memory : 0
AudioDeviceIOBlockSize: 1024
AudioDeviceName: System Default - Speakers (High Definition Audio Device)
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 48000
Build: LR5x34
Direct2DEnabled: false
GL_ACCUM_ALPHA_BITS: 16
GL_ACCUM_BLUE_BITS: 16
GL_ACCUM_GREEN_BITS: 16
GL_ACCUM_RED_BITS: 16
GL_ALPHA_BITS: 8
GL_BLUE_BITS: 8
GL_DEPTH_BITS: 24
GL_GREEN_BITS: 8
GL_MAX_3D_TEXTURE_SIZE: 2048
GL_MAX_TEXTURE_SIZE: 16384
GL_MAX_TEXTURE_UNITS: 8
GL_MAX_VIEWPORT_DIMS: 16384,16384
GL_RED_BITS: 8
GL_RENDERER: Intel(R) Arc(TM) B580 Graphics
GL_SHADING_LANGUAGE_VERSION: 4.60 - Build 32.0.101.8861
GL_STENCIL_BITS: 8
GL_VENDOR: Intel
GL_VERSION: 4.6.0 - Build 32.0.101.8861
GPUDeviceEnabled: false
OGLEnabled: true
GL_EXTENSIONS: GL_AMD_depth_clamp_separate GL_AMD_vertex_shader_layer GL_AMD_vertex_shader_viewport_index GL_ARB_ES2_compatibility GL_ARB_ES3_1_compatibility GL_ARB_ES3_compatibility GL_ARB_arrays_of_arrays GL_ARB_base_instance GL_ARB_bindless_texture GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_cl_event GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control GL_ARB_color_buffer_float GL_ARB_compatibility GL_ARB_compressed_texture_pixel_storage GL_ARB_compute_shader GL_ARB_conditional_render_inverted GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_copy_image GL_ARB_cull_distance GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_derivative_control GL_ARB_direct_state_access GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_indirect GL_ARB_draw_instanced GL_ARB_enhanced_layouts GL_ARB_explicit_attrib_location GL_ARB_explicit_uniform_location GL_ARB_fragment_coord_conventions 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