The known problem is that Edge and Safari do not work with W3TC and gzip. On Edge, strange Unicode is spit out and Safari indicates that the raw data cannot be decoded.
I have installed Brotli, but I mean that the automatically generated nginx.conf does not work.
First the variable w3tc_enc is set to “”, then it checks if br is supported. If it is supported _br is used.
Then w3tc_enc is set to “” again which simply overwrites the previous check and finally it checks for gzip.
How can it work as br?