I said the EXACT same thing on another thread a couple of weeks back:
https://www.northstandchat.com/showthread.php?391251-How-we-ve-got-better-this-season-staying-on-the-front-foot-more&p=10064056&viewfull=1#post10064056
Yep Bozza corrected me earlier. And as I commented it was the right decision then as even if he didn't touch it he is clearly interfering.
On that then it does just go to show how lucky we were against Leicester. Both of their disallowed goals were very dubious......one was just plain wrong!
Agree with you on the foul on Lallana, it was a foul BUT if that was a foul then so was the one on Maupay against Burnley and the one by Maupay against Leicester. So in a way I'm glad there is some consistency there.
IF Sanchez was impeded it was by either Dunk or Duffy (can't remember which)...