I got the same kind of issue but it do not affect merchants and the other player equipment is always about 15 levels lower of the "minimum" item power of the mission. So, same kind of issue but not same bug (still tag as a duplicate by moderation). It seems it only affect classic MCD missions for me (no issue for tower equipment or any kind of merchants).
FixBugsPlease
MCD-7647
I got the same kind of issue but it do not affect merchants and the other player equipment is always about 15 levels lower of the "minimum" item power of the mission. So, same kind of issue but not same bug (still tag as a duplicate by moderation). It seems it only affect classic MCD missions for me (no issue for tower equipment or any kind of merchants).