Dell Powerconnect 6248 Layer 3 - sometimes poor or unanswered pings on vlan gateway ip

Hi,

i have three 6248 (firmware version: 3.3.13.1) configured as vrrp Gateways, one is master and the others are backup.

I have different vlans, all of them are routed vlans.

In some cases the vlan gateway ips are not pingable or the answer is very slow, but if i did a ping between the hosts in different vlans everything works perfect

The vrrp seems to work, i have no errors and the master role is always at the same device.

Does anybody have a hint for me?

Regards,

Sebastian