I have physically 40 stations, but i have it configured as 48 stations. I have one master on station 8 (on main controller). I have 30 zones plus the master psychically wired. The 8 stations above 40 I use for RF devices. I have had it configured this way for a number of years, but it is only recently the time changing issue started.
Maybe this is an issue with 2.3(A/C) running 2.19 with a “larger” number of zones. I do not have one, but perhaps the 3.0 version does not have the issue.