Steps to reproduce:
It appears that the node cannot be open again from now.
Very annoying. I'm trying to disable cascade altogether, but it seems there is no way.
Now it is needed to press 'C' - (change tree root to the selected dir) + Enter to be able opening such a directory.
I am having the same issue. I went back to NerdTree 4.2 for now which works fine.
Click "x" key map(close parent of node) on the line of 'file.txt' will also reproduce this bug @scrooloose .
Add a gif

@juanibiapina , does your PR #558 solve this issue?
It doesn't sove the issue at all. It only adds the option to deactivate the feature that has the bug.
I have the same issue.
This is a confirmed bug. The same as in issue #526. A fix is in progress.
ANNOUNCEMENT: Everyone experiencing this bug can try the fix in pull request #720. It should repair this problem without any side effects. The code is currently under review.
Most helpful comment
Very annoying. I'm trying to disable cascade altogether, but it seems there is no way.