So I'm hoping someone can help me resolve this issue. Im having a lot of issues with stamps refreshing in very particular ways. Stamps don't refresh quickly enough, and sometimes they stop refreshing. I have a link code league card swap going to refresh my stamps, so they should be popping up, but sometimes they just completely stop. Now, raids also are popping up when they're already full or finished. I'm seeing mostly only promoted raids pop up, but then completed raids of rare g max pokemon pop up after the refresh. I wasn't having this issue before, but now I'm hardly seeing any other raids besides promoted raids until the rare raid is already full or finished. Any thoughts?
They don't pop up constantly, and based on my time playing, you're more likely to get new notifications, and you get them more frequently, when you're not on the Y-Comm menu. Either way, you still need to provide at least several seconds. Trading League Cards with a Link Code doesn't cause the Y-Comm to constantly refresh; it just causes the notifications to be recent enough such that you're more easily able to join Max Raid Battles.
If the room fills up quickly enough, however, you won't be able to join. This is the first weekend of the February 2020 Gigantamax event. People are excited to get these Gigantamax Pokémon, especially Toxtricity. There are also people going after Milcery to get the Sweets. As a result, the rooms for the temporarily common Gigantamax Pokémon fill up quickly, typically under 60 seconds.
The third issue is that
Pokémon Sword & Shield is struggling to manage all of these people playing at once. It's a similar paradoxical issue as with
Super Smash Bros. Brawl: the more people are playing online at a time, the slower the online will be. I don't have the programming knowledge to understand why this is the case, just that when there are fewer people, online in this game becomes more stable, reliable, and quick.