Installed without problems in two FG100E in HA mode. Will update thread if problems detected.
Update (20200818): No problems so far and seems that before the upgrade (from 6.0.7) we were also "suffering" the RDP disconnection bug, because now no more disconnects (I though the bug was refering to port forwarding or similar RDP connections, not through SSL-VPN). [strike]Also seems to be solved a problem with[/strike] Update (20200828): Still continues the problem with unwanted CDR messages.[strike]
We have upgraded 14 sites from 6.0.9 to 6.0.10 with no issues. The sites are a mix of 60D, 60E, 100D and 100E. One of the 100E sites is a HA cluster.
Before the upgrade we experienced the RDP over SSL VPN freeze/disconnect bug. After the upgrade this issue was resolved, but we still saw some disconnects in other applications over SSL VPN. We think the remaining issues are due to old FortiClient versions, like 5.6.x. Upgrading to FortiClient 6.0.9 seems to resolve the problem.