Hi Mosabrina, to answer your question I cold ferment for 2-3 days and have not had any fermentation gas issues in the fridge.
There is some gas build up after I put the dough out 2 hours before the bake, but nothing that causes any concern.
It’s kinda fun to ‘burp’ the container and enjoy that yeasty aroma.
The largest dough ball I use in these containers is 250-275 gms.
Good luck