Remote Delay

Hi

osmc remote with usb dongle on N2

At first everything was good. very snappy. fast response. No issues at all.
But since few days ago, the remote response drop significantly. Not snappy as it should. N2 restart or removing the dongle and putting back will solve the issue and usually after a while say a few hours, the delay/response would come again.

TV remote with cec no issue. initially, the response from the TV remote was not as fast and snappy as the osmc with the dongle. But now seems the other way around sometimes.

Any ideas?