P: Can't create ruler guides while transforming a layer

All good with pulling rulers now, and auto commit distance seems bigger. Thank you!

This way guids still do not snap to the side or center of the transform-box (Or selection) like hey used to unfortunately.

auto commit can now be disabled (as well as the default proportional transform) with PSUserConfig.txt

details here: https://helpx.adobe.com/photoshop/kb/enable-optional-extensions-photoshop-cc.html

and a little workflow tip... if you use a rectangle shape layer instead of a crop, you can select View>New Guides from Shape to automatically apply guides. 

sure would have been nice if this applied to any selections, included the crop tool...

Yes, they made a very bad decision which negatively impacts most Ps users with this added "feature."

Until an update is released which fixes this new behavior, you'll need to hold down alt/opt if you click anywhere away from your crop or transform. 

Hi there,

I used to use the croptool by placing symetrical guidelines in my photoshop documents.
While holding the alt-key I set the crop exactly on the place where I liked to place the guidelines and then placed the guidelines. After placing the guidelines I tapped esc and moved on. Perfect workflow for me.

Since I installed CC 2019 something changed. 
After setting the crop where I like to place my guidelines the crop automaticaly applies at the moment I click my mouse at the guidline section. Actually the crop automaticaly applies whereever I click my mouse.

Is there anybody else having the same problem, or does anyone know how I can solve this problem?

The above works, but it's a major hassle to move your images or objects near the ruler if they aren't there already. And in addition, this really only works from the top ruler, because if there is a large space between ruler and canvas (such as above screenshot from Taras Kotulskyi), you cannot drag the guide from the side into the canvas. 

Try moving the image closer to the ruler. It's an alternative workaround.

Photoshop CC 2019:

When I'm using the "warp tool", at the same time I can't create a new "guide line" by moving from the ruler. When I'm clicking on the ruler - my warp manipulations are automatically committed. I think it's a bug.

for example: