useFlags not updating values in react18/Nextjs App Router

[kyle-ssg]

I believe #188 attempted to solve this, however the following project does not see new values for useFlags Flagsmith/flagsmith-js-examples#8. Essentially in the current live version of the SDK events.off('event', eventListener) is removing more than 1 event handler.

To get around it, the PR has a version of flagsmith from https://github.com/Flagsmith/flagsmith-js-client/pull/210/files#diff-090ff4f85a594b9bd7b6f1a515395bd0a604ade2c55db3e5c9e7ea76021cbd7fL156 that fixes the issue, but it'd cause a leak due to the removed line.

I cannot figure out the issue, however maybe we need to implement a version of tinyevents that lets you remove the exact event listener that you setup.

i.e.

const remove = events.on('x'...

return ()=> remove()