I noticed a weird issue in my app - when I have a brand new user and generate App Password, I have troubles sending request against the 2.0 REST API, other than /user which works. For example sending POST request to snippets results in following kind of error (pasted several if that might help investigating).
curl --url https://api.bitbucket.org/2.0/snippets -u "username:app_password" -X POST -H "Content-Type: multipart/form-data" -H "Accept: application/json" -F "title=Super new snippet"
{"type":"error","error":{"message":"Something went wrong","id":"a03db43f7a514b94aa3e557b90f5e880"}}
{"type":"error","error":{"message":"Something went wrong","id":"e26f7c4100954aa9a088463f0d2d4b76"}}
{"type":"error","error":{"message":"Something went wrong","id":"0d12b4492ea4461cb25dfcc6f5aea779"}}