FortiClient IPSec VPN regularly drops for some users

[dajana1]

We have about 100 users using FortiClient (a mix of 7.2.11 and 7.2.12) on Windows 11 laptops (mostly 25H2 but some 24H2) to connect an IPSec tunnel to a Fortinet VM hosted in Azure (UK South). Some users (such as myself) never get connection issues, but some continually report that the VPN drops multiple times during the day. We've done the basic troubleshooting (restart Windows, sit close to the wireless access point, try a cable, speed tests, etc) but we're still unsure what causes this and how we can resolve it.

We opened a ticket with Fortinet to send logs and get to the bottom of this but thought I'd ask the community to see if others have found ways to maybe make it more stable and drop less frequently.

Your thoughts are very welcome :)