Only recently I started to use the AVM VPN. On 1 location I created 2 VPN links to other Fritzboxes. After adding a 3rd VPN and succesfully linking it to a 3rd Fritzbox I noticed that the link to the 2nd one was gone. After I re-entered the credentials for the 2nd one that link was re-established but the 3rd one was broken. Is this to be expected? Never read anything about those kind of limitations. Does this mean I need to switch to OpenVPN?