The fmtnum (and i assume fmttime) function do not work in the media types.

Steps to reproduce:
Import attached template.
Import attached mediatype (I provided a webhook type,to prevent extra configuration, situation is the same for atleast email type notifications)
Configure action, and media as one normally would do.

Execute:
Send in a floating point to the item:

zabbix_sender -z localhost -s "test notification" -k float -o 0.04444545435345345

Generate problem:

zabbix_sender -z localhost -s "test notification" -k sender -o 5 

Result:
Go to Reports -> Action log and observe:

Subject:
Problem: test notification: Testing: 0.04 and without 0.044445454353453449

Message:
Without fmtnum: 0.044445454353453449
With fmtnum: {0.044445454353453449.fmtnum(2)}

Expected:
fmtnum and fmttime to be resolved as they are in the eventname (subject in the result/message)