Why Syslog message that contains time-zone in the message content, field "host" equal to time-zone ?

[tfloros]

Hi,

Messages like:
<180>29658: .Jul 11 11:20:35.908: %SW_DAI-4-DHCP_SNOOPING_DENY: 21 Invalid ARPs (Req) on Gi1/0/35, vlan 3.([ac44.f217.554d/10.xxx.xxx.xxx/0000.0000.0000/10.147.96.1/11:20:34 EEST Thu Jul 11 2019])

OR

<165>122: .Jul 11 11:18:30.889: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: xxxx] [Source: 10.yyy.yyy.yyy] [localport: 22] at 11:18:30 EEST Thu Jul 11 2019

include in the time of day, the time-zone value. Even if we remove from Cisco node the time-zone in service timestamp command, splunk considers as host the value EEST

Any idea how to fix this on the Cisco Networks App or the splunk itself?