You don't need "wisp ap mode" you need "cap mode".
If you want to find differences: reset to no config, try first, export, reset to no config, try second, export - you will have two configs that you can study in any text redactor.
Most likely loops are the result of adding cap interfaces to bridges on both sides, while you need to do it only on one side: either on caps, or on capsman.
in my end I had issue with the wifi network was in the bridge, I needed to add bridge to LAN and WAN only on hAP ac2
yes I want to understand which is preffere either "wisp ap mode" or cap mode
for now I wanted to study with capsman to know how can I build a roaming and add additional cAP in the future...
I think i will move back to "wisp ap" but I dont understand what the bridge mode in wisp ap means.