My components stopped working upon upgrading to 1.14.4.  Please see the video attached here for a much simpler explanation. https://www.youtube.com/watch?v=nwF_VHv4rjg.

This is being run in vanilla Minecraft, off a vanilla server grabbed directly from Minecraft.

Edit: I now know that the issue is tile based, not chunk based. A new repeater placed after the update right next to the components that don't work and is in the same chunk will work. It's almost as if Minecraft thinks these components are still on and will not look for an update.