serverredirect.command.redirect.self - Allowed to use the command on yourself
serverredirect.command.redirect.other -Allowed to use the command on others

This correlates more also with not having to specify yourself either when using the command.

These will be the new permissions for the subcommands:

• /redirect [address] * = serverredirect.command.redirect.all
• /redirect [address] r=[radius] = serverredirect.command.redirect.radius
• /redirect [address] [yourself name or uuid] = serverredirect.command.redirect.self
• /redirect [address] [someone else name or uuid] = serverredirect.command.redirect.others

Please try this: https://github.com/KaiKikuchi/ServerRedirect/releases/tag/v.1.3.8-BETA1

I've tried using the individual new nodes, as well as going back to serverredirect.command.redirect for all of them

The following are the results

/redirect [address] * - Works on everyone but sender. Hoping that is intended, I think it's preferable.
/redirect [address] r=[radius] - Works the same as *
/redirect [address] [yourself name or uuid] - This does NOT work on myself
/redirect [address] [someone else name or uuid] - This works fine on others

So the only issue seems to be the use of commands targeting yourself.