Downvote mana depleted upon delegation return
The account https://hiveblocks.com/@encrypt3dbr0k3r received his delegation return earlier today, upvoting power and RC were at max as it should be when delegation is returned depending on the amount but downvote mana was possibly at 0%. He initiated a smaller powerdown but even attempting to delegate the rest of HP that wasn't powered down (2 million) it wasn't allowing him to most likely due to downvote mana being depleted.
I'm not sure but I think this wasn't occurring before the previous hardfork, but it practically makes the wait time to receive your delegation after 5 days longer if you attempt to direct it somewhere else or start a full powerdown by having to possibly wait another 7 days for your downvote mana to reach 100%.
Downvotes weren't used by this particular account, can't confirm if downvote mana was somewhat depleted from the account the delegation was withdrawn from but that should still not affect it once it's returned.