TP-Link typically provides firmware updates for routers, at least for the first few years after release. It looks like firmware updates have been released for both Version 1 and Version 1.60 of your router. You did not (as near as I can tell) indicate what firmware you are using, but you might want to consider updating the router firmware if you have not done so. Recent firmware updates have provided bug fixes, and some might be relevant to your Othernet equipment.

Make sure to use the firmware update for your particular router model and version, if you decide to do the update. I have done firmware updates on a couple of different TP-Link routers, and it is comparatively painless. Do get assistance if you think it is beyond your technical skills.