Wouldn’t surprise me if this happens to most groups.
Captain Marsh wrote:
Or maybe it's time to take a little break? I worry about doing that because we have such a good steady game-night going.
Bear in mind that ‘taking a break’ doesn’t have to mean ‘breaking up the group.’
Ask if someone else wants to have a go GMing a couple of low-level ‘one-off’ adventures (eg ‘We Be Goblins’ or whatever) just for a change - or even have a go at a few board games for a while. Then come back to it after a few weeks fresh and ready for more RotRL.