The problem/use-case that the feature addresses

In Redis Cluster mode, even if 'readonly' command has already been called on replica, the transaction will not work even if all keys can be found on the replica node.

Description of the feature

As Redis user, I would expect to use transaction with all read-only commands on replica node in cluster mode if all keys can be found on replica.

Additional information
I did the following tests on my replica in cluster mode with redis-cli

Without transaction:

readonly
OK
hget hashtest a
"1"
hget hashtest b
"2"

With transaction:

readonly
multi
OK
hget hashtest a
QUEUED
hget hashtest b
QUEUED
exec
(error) MOVED XXXXXXXXX