P: Before/After Split View ceases showing Before Image if panned to split boundary

[AGeetD]

Issue:

While panning the photos in before & after view, with spilt screen, when a image is fully panned on one side, it fails to reappear on that side of before or after. A screen recording of the concerned problem is attached.

System & LRC version description:

Lightroom Classic version: 12.4 [ 202306052221-b70c0975 ]
License: Creative Cloud
Language setting: en-IN
Operating system: Mac OS 13
Version: 13.4.1 [22F82]
Application architecture: arm64
Logical processor count: 10
Processor speed: NA
SqLite Version: 3.36.0
Built-in memory: 65,536.0 MB
Real memory available to Lightroom: 65,536.0 MB
Real memory used by Lightroom: 11,073.9 MB (16.8%)
Virtual memory used by Lightroom: 4,31,764.3 MB
Memory cache size: 983.4MB
Internal Camera Raw version: 15.4 [ 1508 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 1559MB / 32767MB (4%)
Camera Raw real memory: 1710MB / 65536MB (2%)
Standard Preview Size: 3024 pixels
Displays: 1) 3024x1964

Graphics Processor Info:
Metal: Apple M1 Max
Init State: GPU for Export supported by default
User Preference: Auto

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) Nikon Tether Plugin

Config.lua flags: None

[johnrellis]

I too see that on my LR 12.4 / Mac OS 13.4 / Macbook Pro (16", 2023,  M2 Max), with Preferences > Performance > Use Graphics Processor set to Use GPU For Display and Auto but not Off.  See this screen recording:

https://www.dropbox.com/scl/fi/z99nrk3vdnl7slv2s8yl1/develop-before-after-panning.2023.07.16.mp4?rlk...

[Rikk Flohr: Photography]

I can replicate this. Additionally, I am seeing some film strip flicker when in this state. Are you seeing that also?

[AGeetD]

@Rikk Flohr: Photography, I do not see film strip flicker in this state. I have attached the screen recording. If required, I can share the full quality video of screen recording, had to downgrade it because of the file size limit on uploads.  

[johnrellis]

The filmstrip doesn't flicker in my LR when that problem occurs.

[Rikk Flohr: Photography]

Thanks to you both for confirming the Film Strip is not flickering. I've traced that and it was an independent transient issue.