I'm not sure what's going on here, but whenever I go to a new line, tab doesn't work. It doesn't work in other lines of the same paragraph either, but if I go back to a previous paragraph, hit tab, delete the tab in that paragraph, and then go down to where I want the tab, it lets me do it. But then the problem will pop up again in the next paragraph.
How can I fix this problem and what is causing it?
After further experimentation, I've found that just clicking into another paragraph and clicking back does the trick, most of the time anyway.
After even more experimentation, I've discovered that by inserting a blank line at the end of the document, I can solve the problem for the most part. It usually only occurs when I'm trying to put a tab on the last line of a document. However, this isn't a perfect solution and I'm still having the issue sometimes.