when entering limbo players instantly suffocate in a wall for some reason. what information would be helpful?

Does this happen all the time?

yes it happens every time when the reason for entering limbo is falling out of a pocket dimension, if you are killed by another player in the pocket dimension though, you get sent to limbo successfully

when entering limbo players instantly suffocate in a wall for some reason. what information would be helpful?

Have you set up a worldborder? I've found that doing so leads to players getting instakilled by suffocation, which is very frustrating :/