That is much more likely to be a problem with your server, not the PWA, simply because it is just a client-side web app. Are you on one of the large servers? I’m hearing they’re struggling to service the influx of users.
Although, I suppose it could be exacerbated by the app potentially requesting more from your server than the basic lemmy frontend does. Like, it may not paginate comments and instead request all upfront.
They just pushed an update that might fix that for you. According to the release notes —
Maybe that was causing your issue…I dk