This morning I found that suddenly my bookmark folders on the top bar were highlighted in red and when I left click the folder, it opens all the contents of the folder as a group of tabs. When I right click it opens the bookmark as usual though.
Tried reinstalling chrome and restarting the computer since I suspected my keyboard had an input held down, which sometimes happens but is still doing this behavior. Of note, new bookmark folders I make also have this problem.
Anyone know what setting I accidentally messed up?