Hi Pete, trust you are staying safe & well… there seem to have been a few threads all running with similar issues over recent days - really irritating as you say. See latest comments from myself and Leonel tonight on the TTIG thread TTIG "not connected" in my case its across multiple GW types - TGW/TTIGs/RPi(s)+RAK, Multitech AEP, (RPi+iMST, Laird RG186 & Dragino’s look to have had other problems which have largely resolved now and they show connected again, except a few where known to be offline/under repair or updating for other reasons) etc… you are not alone! 
V. Frustrating!..