P: Local adjustment tools : guides not visible

On first use on an image the guides of the local adjustment tools are not visible (see linked video for a demo)

Steps to reproduce:

• In any library mode, select an image and place the mouse cursor in the central area
• Press M (or Shift+M) to select the gradient or the radial filter
• Wait for Lightroom to automatically switch to develop mode, then click and drag to place the filter, release the mouse button

⇒ neither the pin, nor the guides are visible until you hover one of the side panels with the mouse, then go back over the image

Workaround: hovering one of the side panels before dragging to place the filter avoids the issue.

Extra info:

• This issue has been around for a while now, but is still present in R11.
• There are other steps that can lead to the bug, the ones described are the most easily reproductible
• Whether the « Show edit pins » option is on « Auto » or « Always » makes no difference.

Configuration:
MacBookPro / Catalina 10.15.4 / Core i7 2.6GHz / 16GB RAM / Radeon Pro 460 with full graphics acceleration enabled