After Update to 15.5 version, Histogram randomly disappears from Develop Module

Question

After updating to 15.5, I noticed during the last editing cession of a dozen of landscape pictures with various masks that the histogram disappeared from its window. The RGB values were still changing when the cursor moved over the picture, proving the window was still active. The histogram returned only after entering and exiting the masking tool. But scanning through the photos make it disapeared again later in the develop module for some pictures.

I had to relaunch LRC to have the histogram window working again as it is supposed to be.

Unfortunately this bug seems to happen randomly and cannot be repeated on purpose.

My config is Apple MacBook Pro M1 Max 24Mo Ram OSX latest version of Tahoe, LRC 15.5.

I must say this is the third strange behaviours since the update to 15.5. The first was the uncontrollable scrolling with the arrow key in the film strip, the second being the loss of the zoom ratio in Full view returning automatically to 33.3%. Restarting LRC solved apparently both issues so far. I am crossing my fingers and expect a more stable version in a near future.

Claire H. · Answer

Hi ​@M2A2, Thank you for reaching out to the Lightroom Classic Community Forum! That is strange behavior, and unfortunate that we can't recreate it consistently. Let's try a few things and see if we can fix the issue:Reset Preferences: If the problem persists, resetting preferences may help: https://adobe.ly/3HsQXpA. It is recommended to back up your catalog before resetting preferences. You may refer to this article for more information: https://adobe.ly/4dW8vqF.Check Display Settings: Ensure your display settings are optimal:Go to Edit > Preferences (Windows) or Lightroom Classic > Preferences (macOS).Under the Performance tab, make sure the Use Graphics Processor option is set correctly. Experiment with toggling it on or off.Monitor for Other Issues: Since you mentioned other strange behaviors (uncontrollable scrolling and loss of zoom ratio), observe if these issues coincide with the histogram disappearing. If they do, it may indicate a broader problem with the application that needs further investigation.In the meantime, could you keep a record of when the issue happens and any specific actions you were taking at that time? This information can be helpful for future troubleshooting, if you need it. I hope this helps! ^CH

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