Yes, it sure could be. The native app did work, but I think that utilizes local control, where smartthings might be cloud-to-cloud.
No doubt. I also own a few Ikea devices that work great with smartthings, but apparently are a no-go on hubitat. I’ve ordered some cheap sonoff devices to replace them, but they’re on the slow boat from China.
You’re lucky. I had a ranting post a few months back about events being dropped between webcore and the ST cloud. That lasted several weeks and was very frustrating. I probably have an issue almost daily, but it tends to amount to slow response (8 seconds for a light to turn on, for example). I think my internet connection might be a contributing factor, as it does do funny stuff on windy days.