Trigger expression using data from two hosts

[sszabbix01]

I am trying to create a trigger with an expression that uses data points from two hosts and some simple math. The expression works when I test via the expression constructor, but as soon as it is saved and applied to the hosts it begins to generate a problem even though all of the conditions are supposedly false. Below is the expression I am trying to use. If anyone has any suggestions as to why this is failing I would greatly appreciate any advise

({HOST1:vfs.fs.size[/path/directory,used].last()} - {HOST2:vfs.fs.size[/path/directory,used].last()}) > 1

Zabbix 5.0.21
CentOS 7

[markfree]

The key "vfs.fs.size[fs,used]" returns the used bytes from a file system.
You should check the actual value (bytes) of both file systems.

[sszabbix01]

Here's an update. After playing around with the arithmetic operators (<,>,=) and different values to generate TRUE and FALSE conditions it seems as though the issue is with using the greater than (>) operator. Has anyone seen this behavior before.

[markfree]

The key "vfs.fs.size[fs,used]" returns the used bytes from a file system.
You should check the actual value (bytes) of both file systems.

[sszabbix01]

The key "vfs.fs.size[fs,used]" returns the used bytes from a file system.
You should check the actual value (bytes) of both file systems.

That was the ticket. I was using the wrong measurement for my calculations