Node-red and alexa bug

Hi there
I’ve been using node-red (now at 0.20.7) in a raspberry pi 3 and 4 with node-red-contrib-alexa-home-skill and knxeasy with 40 nodes to integrate my knx net with alexa and for more than 1 year i had not any issues, since 1 month ago when every few hours (15/24h) it stops working: not a raspberry issue because it works and I can reach it from terminal and I even try the new pi 4, node-red in online because i can reach it at localhost/1880, everything is updated and when i give a command to alexa she tells me “ok” like as everything is fine but doesn’t work.
In order to make it work i need to turnoff/on the rasp.

Hope I have been clear
Any idea what is wrong?

TY

Where does home assistant fit in all this?

Ops. Sorry too many windows open.
If some moderator can delete this, thank you