P: LrC 15.6: Sliders bouncing in the Develop module

I had this issue of sliders in the development module moving to the most negative value when I clicked on them. I got on the help line and asked for a real person, they advised that I reinstall the previous LR version (15.5). I did so and the sliders now working as they should. He said this is a bug in 15.6 that will be resolved in the next upgrade.

Moderators, @Sameer K, please merge with the existing bug report:

https://community.adobe.com/bug-reports-674/p-lrc-15-6-sliders-bouncing-in-the-develop-module-1644658/index1.html?sort=oldestFirst#comments

Update to Mac OS 26.7.1 or 27:

https://community.adobe.com/bug-reports-674/p-lrc-15-6-sliders-bouncing-in-the-develop-module-1644658/index1.html?sort=oldestFirst#comments

Whenever I click on any slider in the Develop module of Lightroom Classic, the slider value automatically drops to the most negative value in the range (i.e. it goes to the far left of the slider range). For example, Exposure drops to -5.0, Contrast, Highlights, Whites, Blacks etc drop to -100. The mouse pointer stays where it is (i.e. it doesn’t follow the slider handle). If I then drag the mouse pointer to the right, the slider value follows some distance behind it. It is making Lightroom totally unuseable.

I have a mac mini m4, Lightroom version 15.6. The bug started after I updated to this version a few days ago.

Hi All! Note from the team:

“On macOS Tahoe 26.3 or earlier, if the Develop module sliders move erratically after upgrading to Lightroom Classic 15.6, update to the latest Tahoe version (26.7, or later).”

Thanks!
Sameer K

These symptoms are happening on Mac users with older versions of Mac OS 26 (e.g. 26.2).  Many have reported that updating to the latest version, 26.7.1, or to Mac OS 27, fixes the problem.

Ao selecionar qualquer slide das ferramentas Básico ou Transformação, o slide simplesmente se move sozinho para o "início", por exemplo: se você ajusta o balanço de branco (WB) em 5500K, ao selecionar o slide e "zera" sozinho para 2000K, isso ocorre em todas os slides da ferramenta Básico, bem como, nos slides "deslocamento X", "deslocamento Y", da ferramenta Transformação. O slide antes da atualização se movia com base no ponto de referencia já estabelecido, regredindo ou progredindo a medida que o slide era movido para esquerda ou para direita, agora, apenas ao selecioná-lo, ele se move automaticamente para o mínimo da esquerda, sendo necessário um movimento não natural para chegar ao ponto ideal.

J'ai trouvé une solution alternative, j'espère que ça fonctionnera pour vous.

Ma config : Lightroom Classic 15.6, Apple M2 Max, macOS [ta version].

J'avais le même problème que vous depuis la mise à jour. Dès que je cliquais sur un curseur dans le module Développement, la valeur sautait tout à gauche. C'était infernal, je ne pouvais plus travailler, et désactiver le GPU n'avait rien changé.

Voici ce que j'ai fait. Au lieu de cliquer sur le curseur, je clique sur le chiffre dans le champ de valeur, à droite, puis je change la valeur avec les flèches du clavier. C'est plus lent que de glisser le curseur, mais bien mieux que de retaper chaque valeur à la main, et je peux toujours tâtonner pas à pas pour voir ce qui rend le mieux.

En espérant qu'Adobe corrige ça vite.

ive done the update and its still doing it :-(

if it helps it doesn't matter if I used Apply mouse or Logi 3s it still does it on both.