Scoreboard freezes in Portal Custom with fast action

To duplicate:

Make a Portal Custom server. Make it a small area with one objective or otherwise a fast-action map. Create a custom two-team scoreboard. Play. The scoreboard freezes quite quickly. It stops updating until you respawn, or just stops updating completely. Change it to a default FFA scoreboard. Now it does't freeze completely, but updates slowly at random times.

How could this happen? How is a scoreboard too resource intensive?! How barely adequate are the servers?!

Example: Cairo Chaos, experience code: ZPQ25

I don't know if the problem only happens with bots, but the bots are just defaul battlefield behavior bots, so come on...! I would love to tell you if it happens with a server of only humans, but your management can't see fit to give anyone any incentive to play portal servers other than PVE.