Trouble with Replay Extension

[C0chett0]

For some reason ReplayExtension doesn't work at all for me on the channel. I can set it up at the client level and I properly receive all past events when I subscribe to the PushTopic but it doesn't work on the channel object.

I've used the hasExtension method before and after the addExtension on the channel and it seems ok, it's false before and true after.

Any idea of what I'm missing ?

By the way I also encounter the #74 issue.

For information I'm using laravel 7 and SF API V44.0.