Host Memory Status on some ESXi - False error

Hi everyone ! 

First, sorry for my bad English, I'm a French user.

So, my problem is the following :

I manage different VMware / Vcenter with some ESXi on each platform.

Sometimes, an alert is up for the ESXi but not for all, it's random.

The alert is : host memory status and it's red.

My ask is : How can I correct the alert ?

Complementary information : the alert are false because on the configuration tab, I can see that the memory usage is low (35% approximately).

The alert wake up on random ESXi.

My ESXi version is 5.5.0

BIOS version is P89.

I can't join a screen for security reason ,but this threat is similar :ESXi 5.5.0 Host memory status alert (but for me, it's a red alert).

However, I read some topics about this problem but none of them helped me

Thanks you for your help !

Regards.

For resolving the problem, I try to reset sensors, restart service.sh on the server, acknowledge/clear the alarm but she comes backs etc...