Fortimanager looses FGM-Access over time

[yoloknight]

Hi, I´m using a Fortimanager (v.6.2.6) to serveral Fortigates (also v.6.2.6). Over time the Fortimanager looses the FGM-Acces to some Fortigate´s and I already debbugging it with this cookbooks: https://kb.fortinet.com/kb/documentLink.do?externalID=FD33882 https://kb.fortinet.com/k....do?externalID=FD48001 https://docs.fortinet.com/document/fortimanager/6.2.0/cli-reference/861511/fgfm-reclaim-dev-tunnel (... [size="4"]But in the end I dont find the issue. Also i checked the ports for Input/Output errors (zero tx/rx errors, only sw_in_drop_pkts : 4  errors!?)[/size]

[size="4"]What can be the issue here?[/size]