It is technically not allowed at all…no matter when during the round. It is permitted on non-objective maps, such as sk3 and deadgle5. The rotation is pretty long now, so I don’t know what maps are in it, with my lack of time to play. But it is not permitted at all, even at the end of the round.
Please PM an exec, the CL, or an admin you trust. The other option is to post through the anonymous function at the top of the forums page. An admin signs a pledge to adhere to the rules, and this is not an exception. If admins are doing this, then they need to be dealt with.
At the least, thank you for bringing this to our attention, and we will keep our eyes open for this in the future.