3.7.3 RichText has a child node whose active value is false

When testing the function of version 3.7.3, I found that some child nodes of RichText would have active set to false, resulting in partial display.
After checking the forum feedback and source code, I found that in my case, the node of the Segment obtained by modifying the string after onEnable had active set to false, but after updating the child nodes, the node status of rich-text was not synchronized.
So _activateChildren should be called in the source code to synchronize the parent node status! The way to handle it without modifying the source code is to modify the string and then call onEnable of the corresponding node externally.

How do I downgrade? Do I need to uninstall 16.3 first? Where can I download 16.2?