Bug early release Collector Update V34.500

I have updated some of our collectors to the early release V34.500. After the update, there were various alerts from the DataSource Citrix_XenApp_DatastoreStatus, which could no longer read any data.
After a short error analysis and further tests with other collectors, I replaced the here-string in the PowerShell script with a normal string input:

OOTB:
# Get XenApp specific creds
$XenAppUser = @'
##XENAPP.USER##
'@
$XenAppPass = @'
##XENAPP.PASS##
'@

After customization:
# Get XenApp specific creds
$XenAppUser = '##XENAPP.USER##'
$XenAppPass = '##XENAPP.PASS##'

The query then worked perfectly again. Has anyone else experienced this phenomenon in their environment?