Quick Update on Weblinks and Symlinks doesn't expand the popup editing window.
Make a Weblink or Symlink, then right-click and select "Quick Update".
The popup window is collapsed:

For all other resource types, the popup window is expanded to show all the editing fields.
Popup window should be the same as with other resource types.
MODX 3.0.0-dev
I can re-produce this issue.
I don't see this problem.
MODX Revolution 3.0.0-alpha3 (git), PHP Version 7.4.12
https://user-images.githubusercontent.com/2138260/110241246-f7cb5380-7f79-11eb-9ada-74e1af0fa31c.mp4
I don't have the problem here either, alpha 3, March 1 nightly.
FF 86, OS X 11.2.2, MODX Cloud with PHP 7.3
Yes, seems to be fixed now. Closing this issue.
Most helpful comment
I don't have the problem here either, alpha 3, March 1 nightly.
FF 86, OS X 11.2.2, MODX Cloud with PHP 7.3