Regression introduced in R2 2019.
The line is not deleted
The line is deleted
Delete has no effect if Backspace is pressed before that. If you continue pressing Delete, it will work, but once you press Backspace, the next time you press Delete, it won't delete the character that follows the cursor position.
Regression introduced in v2019.2.619.
The "Paste" option is missing from the contextmenu. The only way to make it appear is to right-click the top left corner of the Editor's content area.
The "Paste" option is present in the contextmenu, regardless of where exactly in the Editor's content area the right-click is performed.