I’ve got tons of comments on this, but must preface with I don’t know the layout of your home or the decision behind configuring it this was in the first place.
115 zigbee devices is only 50% of the max a mesh network can handle. By nature, the mesh network is “living” and constantly changing looking for the most efficient path home. Adding ZAPs to a robust mesh can actually hinder this process. Same goes for the zigbee extender (the old CA piece or new C4 version, unless you’re talking about the 9’ antenna)
Personally is shut everything off and let the CA10 do the work.
if you must keep the networks separate, and depending on how far away they are, channels 23/25 are way too close. Depending on what your 2.4ghz WiFi is running on, I get the channel separated further.
Without doing too much work tho, shutting off the ZAP’s and removing any stand alone “extenders” (remember, besides the original C4 tstat, lighting/KP’s are the best extenders you can get) and separating the channels a little more, after 48-72 hours I’d bet the latency issue clears up pretty noticeably.
and now I’ll let everyone tell you the exact opposite :)