Friends requests you accept in some occasions no longer show as friended until you re-add them on the website or when restarting vrchat.
Legoman99573
This has been happening for over a month now and people i accept friend requests from sometimes will remove them out of random or when switching worlds. Only workaround is to either go to the vrchat website and accept the friend request or restart the game and accept it again and it gets quite annoying when you are already buried in friend requests and makes it harder or near impossible to re-add them back to your friends list let alone remember their names sometimes.
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うまー（umaibow）
(Sorry! Im japanese English very weak..)
I cant see notification friend requests and invite,in game.
but I can see friend requests on website.
I think so this issue is IPv6 connection.
IPv6、IPv4 over IPv6，v6plus(this connection unique in japan)
I will try IPv4 connection.
I hope this issue resolve.
うまー（umaibow）
Report.
I was see notification friend requests and Invite,by IPv4 connection.
I think so this issue is IPv4 over IPv6 connection or v6plus connection.
I was use v6plus connection(this connection unique in japan),because IPv4 connection is very heavy traffic in Japan.
I don't want to use IPv4 connection.I hope this issue resolve.
This issue is Japan user only?
Thank you.
うまー（umaibow）
Postscript
There are various types of ISP for v6 connection in Japan.
I have heard that the IPv4 over IPv6 method has been resolved.
I may not support IPv4 over IPv6.
My ISP uses MAP-E to connect, and this problem continues.
(This web page is in Japanese)
Although it is not detailed, there seems to be another method called DS-Lite.
うまー（umaibow）
report
Unchecking IPv6 on network adapters will now send friend and invitation notifications.
I want to use it now.
GalacticAJan
i had almost heartbreaking inability to get friend request through from few nice people i met today, they sent it but it failed then i sent one and it finally registered on both ends but hour later in game nobody showed up BUT on website they there, offline list just failed to show them in game after long day all went to sleep and started to look up names that need to be favorited for better sync
Observer.
Only a month for you huh. I reported this issue back in October 2019. Still having problems with invites and friend requests including your described issue.
It's a miracle if anything is received in the first place and it's infuriating when it reverses an accepted friend request. In the reversing situation I find if both users send a friend request it will eventually figure out that you two want to be friends and it should stick, otherwise there is a risk of it not working when only one person sends and one person accepts. Can't be used in every situation but I found that worked for me.
I often see people try to friend each other but then have to unfriend and keep trying until it finally shows them both as friends to each other.
Legoman99573
Observer.: Not sure how its been this long, but it has become more noticable recently.
Observer.
Legoman99573: You're going to get a kick out of this. I thought October was the last time I reported this issue. I just remembered I posted a bug report earlier than my last email. Looks like this has been happening as far back as June 2019 https://vrchat.canny.io/bug-reports/p/772-friends-only-showing-for-one-person