I use the Deco IoT-Network and Device Isolation in order to shut out my IoT Devices (such as Shelly dimmers and raspberry Pis).

But my Devices incrementally started to not be able to see each other. I was testing a script that uses rpc Calls (HTTP GET) between Shellys. And after many attempts one by one i wasn't able to call them anymore and the request time out. Strangely, if a isolated device tries to call another isolated device from the Non-IoT-Network, it works

It just seems like the Deco did something under the hood within the IoT-Network that blocks calls from Devices that did a number of rpc calls, and now no device can talk to each other. In order to access the isolated IoT-Devices i need to connect my isolated PC to the non IoT-Network, otherwise i can't see them. The badly programmed App (really slow to update states since evertything is shoveled through the damn cloud) is of now help and the diminshed Web Interface offers no insight or debugging ability of what exactly Deco does here.

(Also, using the problematic IoT-Devices on a completely different no Tp-Link Access Point shows none of these problems)

What the hell is happening?