I have 3 IPC-HDW5231R-ZE and an IPC-HDW5831R-ZE (thanks Andy!), all running fine on a 24 port UniFi Switch US‑24‑250W (with 4 x upgraded fans) and no problem at all.
I fired up the 8 port Unifi Switch US‑8‑60W (4 POE port version), connected to the 24 Port and moved one camera onto that and it...