I am using a R2S with a firmware from https://github.com/DHDAXCW/NanoPi-R2S-2021/releases, however, when I open WhatsApp on my phone or computer it keeps loading for a very long time until it finally connects. Actually, with any firmware for the R2S I experience this issue.
Since I am in China and I am required to use HelloWorld or ShadowSocks R Plus as a proxy plugins to get over the restricted sites, I do not know if this is a related issue.
If I use a raspberry Pi B4 with the same settings there is no problem. Does anyone know how to resolve this?