In QGIS 3.18. When in Edit Mode, there does not seem to be an obvious way of undoing a single edit to the Attribute Table. For example, if I change the value of Attribute 1 for Feature A from 'XYZ' to 'ABC', I don't seem to have the option of undoing to get 'XYZ' back. The Attribute Table doesn't have an Undo button, and the Undo button for the project doesn't do anything to my Attribute Table edits, nor does Ctrl+Z.
This can be a major problem for me if I've made an editing error, I'm not sure what value was in the cell before my edit, and the only way to get it back appears to be exiting Edit mode and not saving my changes. I've lost a lot of time and work that way (yes, I could save changes after every single edit but that is not realistic or practical). [As a side note, this is especially frustrating when I accidentally click that little "X arrow" inside each cell on the right, which deletes the value of the cell. Many times I simply wish to edit the value, but end up deleting it and not being able to get it back.]
This question has been asked before: here, for example (a closed thread from many years ago). But am I mistaken, or has this issue not yet been solved?