After recording 20 goals and 20 assists in all competitions last term, Sancho has so far tallied just one goal and three assists in the new campaign.
And boss Favre believes United's public interest has played some role in Sancho's unspectacular start to the season.
Favre said: “Every player has slow periods.
“There was a lot of talk about Jadon in the summer, something like that can also have an influence.
“But no player is consistently in top form for a year, that's impossible. You have to accept that."