Today I posted an answer on Physics SE which has received a fair amount of attention. However, the reputation increase stopped after about 20 upvotes. I’m not exactly sure how the reputation system works — is this an intended feature? It’d also be neat to see a general list of what actions correspond to which increases/decreases of reputation.
Yes, this is intended. You can earn at most 200 reputation through upvotes in a single UTC day. The reputation through accepted answers is not affected by this.