I had a lot of Z-Wave quirks with HomeSeer - for the most part it worked fantastically but there would be random jams, delays, and devices not responding. Could work perfectly for hours and then for 5 seconds everything is backlogged and catches up.
My blinds and door lock were the worse. HomeSeer is adamant that this is a factor of life with Z-Wave, that you need to have the door lock within no further than 3 hair widths away from the Z-Wave stick, and even then the fact that it so often ends up in “unknown” state is simply how it is. I even wrote a script that detected when the lock was in unknown state and would start polling the lock to try and correct it - instead of the door being left unlocked multiple times a day it instead only happened once or twice a week.
Installed Home Assistant in place same gear and not only have I not had a single Z-Wave issue, but the blinds and door lock has been 100% reliable without any scripts what-so-ever. None of this optimisation crap, whether whole thing or being insanely selective over doing it with specific ones, everything just simply left as is. Works an absolute treat.
Doesn’t help troubleshoot why you ARE having an issue, but my home is quite large and spread out and I have even put a Fibaro implant inside my chicken coop at the end of my backyard… without a single care in the world everything is in range and it would be because of the mains powered Z-wave switches behind every light switch creating the massive mesh. Yes, the repeater function is a mandatory part of Z-Wave devices if they are powered so all your devices should be passing it along. I believe there is a hop-count limit perhaps, so if you had a long string of them that would become an issue.
Oh one thing I have found that doesn’t work will with the repeater system - at least in my experience, Aeotec SmartSwitches don’t work through Fibaro repeater devices. Unless the SmartSwitch can reach the Z-Wave stick itself, or another Aeotec (powered) device, then you’re out of action. But those SmartSwitches aren’t very reliable, I wasted money on a lot of them and I’ve almost replaced them all over the years as they’re not very good.
That might be the issue with your blinds perhaps.
Your lock though that’s another story - I going from memory here, but I think only a secure-included device can repeat another secure device. So your lock could only be repeated by say a Z-Wave switch that is running secure, otherwise it has to talk direct to the Z-Wave. And for inclusion it first has to talk direct, then it can relay. I think thems the rules, I prefer my lock to talk direct give my stresses of house being left unlocked courtesy of HS.
Hope something here is of value?