I can't tell from that snip what is occurring, but I can advise that if you have 64mb RAM APs in use (7363/7962/7762) that you should segregate your ZD/APs from client traffic VLANs, with what we'd call the management VLAN.
Client VLANs often contain lots of broadcast/multicast traffic, and APs have to
inspect all packets to determine client traffic from the other bcast/mcast. We have
seen IPv6 floods having an impact and causing APs to lose heartbeats with ZD
too. Filter IPv6 at your VLAN router/switches if not used.
Avoid the use of TKIP/Auto settings in PSK WLANs, and use WPA2/AES combo
only. Otherwise, if you continue to encounter application reboots, open a ticket
with Tech Support for deeper investigation.