I’ve run into this problem also with both a 2.4Ghz mouse and a 2.4Ghz mouse and keyboard combo, never really quite realised that it was to do with the hub, but had clocked that an extension lead corrects it for some reason!

Thank for pointing this out as it means I actually know to put the dongles on extension leads, I always thought it was something to do with a weird grounding issue on a cheap hub or something