P: Photoshop drawing random lines when using tools (Remove, Brush and other drawing tools)

Unfortunately you haven't given us any information about your system. Therefore, all proposed solutions are a guesswork.

But it seems that’s possibly an issue with the preferences or with the graphic device.

First try to reset the Photoshop preferences

https://helpx.adobe.com/ie/photoshop/using/preferences.html#Manually

Remember to back up your settings before doing the preference reset

https://helpx.adobe.com/ie/photoshop/using/preset-migration.html

If this doesn’t help, try to disable the option to "Use Graphics Procesor" from Photoshop by going to Preferences, then Performance. Once done, quit & relaunch Photoshop to check if that helps.

If it helps, you can check out the steps suggested here:   https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html

Check also if your system is up-to-date. Do you have installed all recent updates and patches for the operating system and the device drivers, especially the graphic driver. Please make also sure that you have installed the Studio version and not the Game Ready version of your NVidia driver.

If this all doesn’t help provide a copy of your 'System Info'. This can be get from the Photoshop menu item Help > System Info. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.

photoshop version: 27.5.0

OS: Windows 11Pro

I’m mostly using the selection brush tool or the spot healing brush tool, but this issue is also affecting various other selection tools, healing tools, brush tools, eraser tools, and pen tools when I try to use them.

I’ll use the selection brush tool as an example. When I zoom into the image and try to highlight one thing like the seat of a chair, the tool also randomly highlights other parts of the image that I did not touch, mostly in the form of a single line, but sometimes multiple lines bouncing off the edges of the screen and forming whole shapes or blobs. The same thing happens if I try to use subtract instead of add. It’ll subtract random parts of the highlighted bits that I did not touch along with what I did. Since this problem is also happening with all those other tools, photoshop is basically unusable for me. I’ve tried resetting the tools, I’ve tried checking for updated, I’ve tried uninstalling and reinstalling the app and nothing has fixed the issue. 

When you use the lasso selection tool, click with your mouse on a place on the photo, many times it starts to select random figures. When this is not happening sometimes you can trigger it by making a selection and then delete this selection by Crtr-D. And then click left with the mouse on 1 place. 

I have test it on several versions. But version 27.0 is oke. The newer versions and the last one have this bug. 

Bonjour, 

J'ai le même problème avec mon Photoshop pourtant à jour. Et je ne sais pas pourquoi... 

Est-ce la dernière mise à jour qui pose ce problème qui rend tous les outils de correction inutilisables ?

Merci 

In PS when using the clone stamp, healing, burn or curves adjustment tools, one click causes PS to render several unintended brush strokes. The numerous brush strokes seen on this layer mask were rendered with one click with a soft round brush. Similar results using the other mentioned tools.

Was this ever fixed? This is happening now to me at work and at home. Completely unusable. Do we get a month comped in our CC subscription because Adobe can’t fix it’s flagship program? 

This is also happening to me. It’s impossible to finish my edit - when will this bug be fixed???

Thanks! :-)

​@S Froehlich you’re not alone