Disable earlier fix for member avatar in composer once server-fix is in place #7367
Description
matrix-org/matrix-react-sdk#2132 can probably be reverted once matrix-org/synapse#3916 is available on matrix.org HS.
Only HS with clients with LL enabled that are not running latest synapse would see crashes in their riot? Sounds like saying there "this is an unstable feature and you need to update synapse to keep using it" is ok.