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#ask-questions
Title
# ask-questions
l

lively-quill-9814

01/14/2024, 12:17 PM
Hey all! I have two issues when using the React SDK (version “^0.19.0”) in my Next.js app: 1. The classes for Sticky Bucketing (e.g.
BrowserCookieStickyBucketService
) are not exported from “@growthbook/growthbook” (first screenshot)
version issue 2. I have some experiments which cause trackingCallback to be assigned on page-load instantly. But I’m using Firebase Auth which can sometimes take longer to log in. So my
trackingCallback
gets called before auth has completed. What’s the best way to solve that?
r

rhythmic-agent-34208

01/17/2024, 8:54 PM
Hi Mikhail, thanks for reaching out. 1. We released version 2.7 yesterday which contains Sticky Bucketing. Could you let me know if you're still seeing the export error with the React SDK? 2. Can you do a conditional check to make sure authentication is complete before firing the trackingCallback?
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