My assumption is, that when entering Developer Tools/States, the whole list is loaded at once. It was fine with tents of sensors. But not thousands. Some of them contain excessive data in the form of attributes.
On my iPhone, entering into States takes 8 secs (local connection via WiFi).
On PC it’s about 1.5-2 sek.
is it either the total data amount to transfer or client-side computing time, it’s definitively too long.
And a number of entities will only grow over time