rrdcached error

I'm pretty new to Proxmox. I have pfsense and pihole both in VMs. They are using vlan tagging and are under a bridge port going to my cisco switch. 2-3 times per hour proxmox will timeout for 30-60 seconds and I will lose connection to the internet, but lan connetion seems fine. I have tried...

i have just added another node (to an existing 10 node cluster) an i have the following error: Jan 15 15:07:14 pve-srv5 pmxcfs[2914]: [quorum] crit: quorum_initialize failed: 2 Jan 15 15:07:14 pve-srv5 pmxcfs[2914]: [confdb] crit: cmap_initialize failed: 2 Jan 15 15:07:14 pve-srv5 pmxcfs[2914]...

hi, i found error intry for rrd cache, on all nodes and on cluster is ntp server installed and time is correct. how can we fix this problem? best regards Jan 30 21:21:09 pegasus rrdcached[1179]: queue_thread_main: rrd_update_r (/var/lib/rrdcached/db/pve2-vm/5135) failed with status -1...