Welcome. I’ve got 3 of the same Aeotec Recessed Door Sensor 7 devices on my C-7 with 2.2.3.148 firmware. You may have read my posts upthread here:
and here, in another thread, regarding how to set preferences:
I strongly suggest that you exclude, factory reset, then re-include the Aeotec Recessed Door Sensor 7 devices WITH NO SECURITY unless these truly are external door sensors. S2 security is problematic with C-7 and 2.2.3.148 firmware. These issues are expected to be fixed when 2.2.4 comes out, probably next week. You could just wait for that. I was never able to make mine work reliably when paired S2.
You may have mesh issues. Hubitat doesn’t seem to function as well as other hubs in presence of a weak mesh (I, like you, was on ST for awhile before coming to Hubitat). I just accepted this and installed repeaters. I use the Ring Extender 2 devices (I have 4) for two reasons:
(1) they have internal battery backup, and thus will keep your mesh up during power fail, and
(2) they report power fail events (but apparently must be paired S2 in order to do so). I have one in our garage in order to report loss of power for our freezer.
One other thing: the C-7 with 2.2.3.148 frequently reports that the Aeotec Recessed Door Sensor 7 devices are “failed” or “not responding “ even though the devices are working fine. I just ignore these messages. Support has indicated to me that the Aeotec Recessed Door Sensor 7 issues are expected to be fixed in 2.2.4 firmware.
Hope these suggestions help get you up and running. Welcome.