Thread:Extension talk:LiquidThreads/Drag to new location - strange behaviour; not working correctly/reply

There is a bug in the JavaScript used by the extension (see 28407).

Until it is fixed, the only way I know to drag a topic to a new location is to to disable JS in the browser, use the feature (i.e. click on "Merge into another thread", wait the page to reload, then click on "Merge into this thread" in the target), and then enable JS again.