Hello Abdul (and all),
If you are still experiencing these disconnects, please check your Radio Settings Profiles and ensure "Client Balancing" is disabled. I have been seeing issues in both MR29.4 and MR29.5 and it appears to be a compatibility issue between clients with 802.11v-related roaming decisions (client based) and Radio Setting Client Balancing (infrastructure-based).
What I have seen, across multiple customers, are clients being disconnected and reconnecting to the same AP and it looks like this in the roaming analytics page. Each dot indicates a brief disconnect/reconnect and reconnect to same AP, these go away after disabling Client Balancing in Radio Profile.
I hear there is a fix for this coming in MR30.x but have not tested it yet.
Hopefully this is helpful.
Ben