Flex Queue Invite Bug [CLIENT]

Hello, I came across a bug where I cannot invite someone to queue up for a game in flex queue through the invite list if I cannot play with them in solo queue. I can invite them through the suggested players option on the bottom right. While this does not seem like big problem, my friends and I have had to cancel multiple lobbies just so we could invite one person. An Example, a Silver Solo Queuer but Gold in flex is unable to invite a Platinum Solo Queuer but Silver in flex to a flex game. Anyone else having this problem is their friends or is it just me and the people I play with.