That's not encouraging. None of my flows are working after disable and re-enable, and I was about to try the more time-consuming step of duplicating and re-establishing all the IFTTT links. Don't know what to try next if that doesn't work. My flows use variables too.
BTW, Stringify won't talk to my Honeywell Lyric T5 any more, even after I tried reconnecting the account a couple of times (reconnect appears to work, but no change). I'm afraid if I delete the Thing entirely and start from scratch I will have to re-create all my flows using the thermostat Thing.