The list context menu for copying path/filename to clipboard can under some circumstances truncate long filenames/paths for display reasons, but when invoked, the path copied to clipboard is also truncated, this happens on paths < 260, the truncation can be at the end of the filename or sometimes in the middle of the path depending on the path/filename. Here is an example screenshot with a filename constructed purely for reproducing the issue, marked areas will go to clipboard as shown.