One minute has been proposed as a halfway point.
But BBC Sport understands that concerns remain about negative impacts.
Manchester United were left fuming last season when Matthijs de Ligt was forced to leave the field with a cut, and Brentford scored from a corner when he was off the pitch.
One minute’s absence could potentially increase the likelihood of a team conceding a goal with fewer than 10 players.
Thirty seconds have already caused frustration among supporters – and the unintended consequences of conceded goals could put further pressure on the officials.
There is recognition that players use alleged injuries as a way to disrupt play, but it is felt that increasing the time limit may actually unfairly penalise injured players.
There are a few exceptions.
The injured player is not required to remain out if the opponent is shown a yellow or red card. Goalkeepers are also exempt, while a player taking a penalty can stay.
However, IFAB is not expected to pass any resolution dealing with the strategic timeout. This occurs when a goalkeeper passes the ball down for the coach to receive new instructions for the team.
Ifab’s advisory panel has discussed this issue in some detail, but so far no consensus has been reached on a solution.
Following the success of the eight-second ball-holding rule for goalkeepers, new countdown measures are set to be approved.
A similar process will be added to goal kicks and throw-ins, with possession changing to the opposition if it takes too long.
A 10-second limit will also be imposed on substitute players – replacements must enter the field within this time.
A team must play with 10 players until the next stoppage, and that must be after at least 60 seconds.
iFab is expected to approve reviews by the video assistant referee for unfairly awarded second yellow cards and, as a competition opt-in, corners.
The Canadian Premier League is also likely to get permission to begin testing Arsène Wenger’s daylight offside rule.
