[Bug] New tabs started to open at the end of tabs list

[GrayFace]

I have "New tab position" set to "Next to current tab", but about a month ago new tabs started to open at the end of tabs list. This doesn't include middle-clicked links, but includes URLs from command line and, most importantly, tabs opened by extensions - Greasemonkey scripts, bookmarks (opened by Neater Bookmarks) etc.