Orbot not working?

Hi, on my /e/ 0.13 phone I tried to use Orbot (16.3.3-RC-1-tor- from the Guardian repository. The /e/ web browser was configured as Tor enabled app in Orbot.

However, whenever I activate the VPN in Orbot (Orbot reports successful connection to the tor network) and start the /e/ web browser (from within Orbot), https://check.torproject.org/ always reports “Sorry. You are not using Tor.”

The same happens with other browsers (configured for Orbot VPN), too.

Any ideas what might be going wrong here?