Upgraded to 5.6 and having Horizon issues

So, upgraded my app to 5.6 which was ok, but noticed my redis queues were having issues. This gets logged every few minutes.

[2018-02-08 03:03:06] local.ERROR: Error while reading line from the server. [tcp://127.0.0.1:6379] {"exception":"[object] (Predis\Connection\ConnectionException(code: 0): Error while reading line from the server. [tcp://127.0.0.1:6379] at /Users/richard/Sites/app-hidden/vendor/predis/predis/src/Connection/AbstractConnection.php:155)
[stacktrace]
#0 /Users/richard/Sites/app-hidden/vendor/predis/predis/src/Connection/StreamConnection.php(314): Predis\Connection\AbstractConnection->onConnectionError('Error while rea...')
#1 /Users/richard/Sites/app-hidden/vendor/predis/predis/src/Connection/AbstractConnection.php(120): Predis\Connection\StreamConnection->read()
#2 /Users/richard/Sites/app-hidden/vendor/predis/predis/src/Connection/AbstractConnection.php(112): Predis\Connection\AbstractConnection->readResponse(Object(Predis\Command\ListPopFirstBlocking))
#3 /Users/richard/Sites/app-hidden/vendor/predis/predis/src/Client.php(331): Predis\Connection\AbstractConnection->executeCommand(Object(Predis\Command\ListPopFirstBlocking))
#4 /Users/richard/Sites/app-hidden/vendor/predis/predis/src/Client.php(314): Predis\Client->executeCommand(Object(Predis\Command\ListPopFirstBlocking))
#5 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(96): Predis\Client->__call('blpop', Array)
#6 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(108): Illuminate\Redis\Connections\Connection->command('blpop', Array)
#7 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/RedisQueue.php(230): Illuminate\Redis\Connections\Connection->__call('blpop', Array)
#8 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/RedisQueue.php(213): Illuminate\Queue\RedisQueue->blockingPop('queues:default')
#9 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/RedisQueue.php(165): Illuminate\Queue\RedisQueue->retrieveNextJob('queues:default')
#10 /Users/richard/Sites/app-hidden/vendor/laravel/horizon/src/RedisQueue.php(92): Illuminate\Queue\RedisQueue->pop('default')
#11 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/Worker.php(246): Laravel\Horizon\RedisQueue->pop('default')
#12 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/Worker.php(107): Illuminate\Queue\Worker->getNextJob(Object(Laravel\Horizon\RedisQueue), 'default')
#13 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/Console/WorkCommand.php(101): Illuminate\Queue\Worker->daemon('redis', 'default', Object(Illuminate\Queue\WorkerOptions))
#14 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Queue/Console/WorkCommand.php(85): Illuminate\Queue\Console\WorkCommand->runWorker('redis', 'default')
#15 [internal function]: Illuminate\Queue\Console\WorkCommand->handle()
#16 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(29): call_user_func_array(Array, Array)
#17 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container\{closure}()
#18 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(Illuminate\Foundation\Application), Array, Object(Closure))
#19 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Container/Container.php(564): Illuminate\Container\BoundMethod::call(Object(Illuminate\Foundation\Application), Array, Array, NULL)
#20 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Console/Command.php(183): Illuminate\Container\Container->call(Array)
#21 /Users/richard/Sites/app-hidden/vendor/symfony/console/Command/Command.php(252): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
#22 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Console/Command.php(170): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
#23 /Users/richard/Sites/app-hidden/vendor/symfony/console/Application.php(865): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#24 /Users/richard/Sites/app-hidden/vendor/symfony/console/Application.php(241): Symfony\Component\Console\Application->doRunCommand(Object(Laravel\Horizon\Console\WorkCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#25 /Users/richard/Sites/app-hidden/vendor/symfony/console/Application.php(143): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#26 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Console/Application.php(88): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#27 /Users/richard/Sites/app-hidden/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(121): Illuminate\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#28 /Users/richard/Sites/app-hidden/artisan(37): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#29 {main}
"} 

I've updated redis per homebrew etc and this still persists when Horizon is running. Having deployed the app to my Forge test server the queues/horizon and same issue. I've flushed the redis DB as well.

Anyone any thoughts?