Automation not working when using AG AU plugin, in plugins after the first one

[apohl79]

Discussed in #1278

^{Originally posted by marioCoding03 October 6, 2023}
Hello,

I would like to report an issue with the AU plugin of Audiogridder.

When attempting to automate parameters on slots/plugins beyond the first one, the parameters can be assigned for automation, but when I attempt to adjust the parameter from the hosted plugin, it sends a zero value back to the DAW and stays at zero.
As a result, no parameters can be automated in plugins placed after the first plugin.
I have tested the issue multiple times and it is consistent.

Here is a video that shows the issue: https://drive.google.com/file/d/1EH4kXY3VrigJcd2AvqYomi8u6sSk_Jdf/view?usp=sharing

The issue occurs regardless of the hosted plugin and it happens only when using Audiogridder AU. The AG VST3 does not have this issue.

Thanks in Advance!