Read issues while Healing under progress

Hello Experts,

I got introduced to RHGS recently and i am getting to know things step by step, as i understand in a dispersed volume with Erasure code 4+2, we allow a failure of 2 bricks at most. please excuse and correct me if i am wrong.

When a brick is offline, heal entries starts to pile up, and when the bad brick is online, healing process 'actually' start healing the data till all 6 blocks (4 data +2 parity) of data are in sync.

My question is, in this situation at any point of time, be it when 2 bricks are offline when no healing is actually possible, and online when healing is actually going on, is there any possibility of application reading the file getting a read error?