Not sure. There’s another related Bug Report here that might be the same, though it seems to affect mostly South American users:
https://forum.inaturalist.org/t/panel-de-estacionalidad-y-de-top-identificadores-no-funciona/72665
I would try enabling/disabling any extensions for testing and trying a VPN to see if that affects performance first and then using any results from those tests to determine whether this seems to be the same bug or different.
@deboas I think maybe you are in Brazil sometimes at least? You may want to take a look at the BR linked above as well and do some VPN testing or something to see if your report here is related.