Unable to connect to Home Assistant ... sometimes

Hello all,

I’ve a problem with my hass.io installation on a raspberry pi4. (the default method).
I’ve followed a guide on youtube to connecting to my home assistant via internet using NGInx and DuckDns and is working fine… but SOMETIMES i get the “Unable to connect to Home Assistant. Retry” error. Trying after few minutes solves the problem, but it’s frustrating. I’ve read the forum around and found that probably the problem is related to “http/2” nginx but I can’t find how to modify this setting. There’s no option on Nginx addon. Using Nginx proxy manager seems not “connecting” to my existing configuration.
So… any help? Thank you!

up?
(ten chars)
image

Nothing? :frowning: