Reset keys, can't access teams

I just tested out keybase, and messed around a bit with keys while learning. I've created some teams during that time too.

Then I gave ownership of those teams to a friend, so I could clean up my account with "Reset your keys & start from scratch"

I then got the ownership transferred back, but I'm not able to list the teams anymore.

In the terminal, I get:
```
$ keybase team list-memberships
▶ ERROR multiple errors while loading team list
```

I guessed that the option -debug would add some debug output, and it seems to be stuck in a loop and gives up. I don't want to post the debug log, since I don't know if the device secret is there. But it seems like I get some
`- TeamLoader#loadUserForSigVerification(1) -> ERROR: Not found: User`
`- TeamLoader#load2(....., public:false) -> Not found: User`

My username is "pengi", and one of the teams I should be a member of is called "op6"

Start by reproducing `keybase team list-memberships` for user `pengi` after resetting keys and transferring ownership of team `op6` back. Review the reported TeamLoader errors and debug-loop behavior, taking care not to expose device secrets. Done means memberships load normally or the failure is reported with a safe, actionable error.

Written by the indexing model from the issue text.