SNMP Trap: Invalid REGEXP on some auto-generated items

[herlincl]

While using LLD to generate SNMP trap items, I'm having some of the auto-generated items marked as not supported due to invalid regular expressions, despite being generated using the same template.

For the LLD item prototype, I've defined the key:

snmptrap["(\Q.1.3.6.1.4.1.9.9.513.0.4\E)(.|[[:space:]])*(\Q{#APNAME}\E)"]

All items are generating as expected, and some are marked as supported. Those items are correctly identifying traps passed to the trap log file.

This item key is operational:

snmptrap["(\Q.1.3.6.1.4.1.14179.2.6.3.8\E)(.|[[:space:]])*(\QAmp_AP05\E)"]

This key is marked as invalid:

snmptrap["(\Q.1.3.6.1.4.1.14179.2.6.3.8\E)(.|[[:space:]])*(\QAmp_AP06\E)"]

Proxy is version 4.0.2 on Ubuntu 18.04
Server is version 4.0.2 on Ubuntu 18.04

[herlincl]

Grabbed the wrong key entry from LLD, the correct one is

 
 snmptrap["(\Q.1.3.6.1.4.1.14179.2.6.3.8\E)(.|[[:space:]])*(\Q{#APNAME}\E)"]

[herlincl]

Should someone else encounter this, it appears to be a graphical bug, possibly related to ZBX-15318.

The items are marked as invalid and not supported after creation. However, when a matching trap is received, it was recognized and the item's status was automatically updated to "Enabled."