Yes, there may.
We know from Roger Caffin's articles and posts that reducing the distance between the burner and the pot bottom may greatly increase carbon monoxide emissions.
Completely surrounding the burner? I don't know. But I do know how deadly and insidious CO can be.
Sometime ago, SP introduced an ALU screen for its Gigapower stove that sits above the burner head, thus does not direct heat toward the canister.
Some of us have redone that product in Ti, using Ti pot bottoms:
Something like this, but less fancy, has been done with a foil pieplate.
When it is cold, windy and/or and the rain is pouring, it is nice to have a hot meal under the vestibule cover. But the cover greatly reduces ventilation compared with being outside the shelter. That is especially so for those who prefer vestibules that come right down to the ground (Not I).
Until I know beyond doubt that a full screen is safe, the less confining screen, with a design from the manufacturer, is comforting, and also works great. It increased the burn time on the SP-GP, already great, by at least 20%, and eliminated the need to hunt for further wind protection when using the stove outside the tent.
Hope this is worth some food for thought.