Project Red Input: Not Working

Project Red Output: Working

Project Red Input With Repeater: Working (WTF?)

but signal showing 14 Instead 15?

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I updated

Check the signal strength, maybe?

I haven't been able to reproduce this issue at all. The "other" RS controller doesn't keep its IO state across world/chunk reloads, that will be fixed in the next release. Panels showing 14 rather than 15 for P:R wires should be fixed then as well.
Could you post a mod list and detailed steps for reproducing the issue? There's a decent chance I'm unable to replicate this due to some little detail (something like the order in which I placed things) being different from your setup.

Ok.
I found the bug in PR.

And, Yes. it is #59

Please release next version to understand that.