Yes I've reset my Chameleon IHD numerous times - it doesn't seem to make any difference. On the occasions when the tariff has updated, it has done it overnight with no need for a reset. The most recent update that (almost) worked was earlier this week, when the Electricity tariff was updated for the July rate, but still at the non-DD rate. The gas had updated 2 weeks earlier, but again to the non-DD rate.
With the apps, I still have a few gaps for May and June Gas in the E.On app, 17th - 20th June still showing No Data for Gas but all Electricity data is showing, but in Bright all the data is there for those dates🙄. The data did seem to be slow updating a few weeks ago, with Bright taking up to 2 days sometimes for it show, but the rest of the time it has seemed to update within the day.
One thing that I do find curious is that the Bright app, E.On app and the IHD show different kWh readings for Gas each day - eg, 17th July, IHD shows 2.36 kWh, E.On app shows 2.40, Bright shows 2.37 then 19th July, IHD shows 3.17 kWH, E.On app shows 3.18 but Bright shows 3.22 kWh so even the inconsistencies are inconsistent 🤣