I can't seem to be able to disable the Neuron's timer while running omnicc, and as a result I get two timers on my buttons!!!
I tried toggling the related option in the bar edit mode for each bar but that didn't help.
Is this a known issue or am I doing something wrong?

no, the actual text that count downs to zero (right icon on the attached screenshot). I have to use omnicc because of its integration with other mods.

To me it seems to be related to saving/persisting the settings between sessions or reloads. I have to make bag bar & cast bar hidden every time i log in, so maybe hiding the timer text also doesn't get saved and I get the duplicate.

yeah, you can disable that countdown text right from in the bar editor window. In the bottom right box there are options for cooldown text and such

Hrm, I'm not sure. I've never used Omnicc. Do you mean the text timer or the overlay clock style CD timer

yeah, you can disable that countdown text right from in the bar editor window. In the bottom right box there are options for cooldown text and such

@brittyazel
That's what I mentioned in my post that I fiddled with and got no results. It has no effect!

As I mentioned I also have to re-hide some bars every time I log in! So I think there may be another underlying issue.

Its old debate where those double coodowns come from.I never used Neuron coodldows (have them turned off) and still get those on some spells especially on those with charges wher 1st charge goes normally but 2nd gets double coldowns.
That bug is present for couple of years because Ion authors said it was Omincc problem,Omnicc said it s Ion(now Neurn ) problem and it never got fixed.
tullamods/OmniCC#162 (comment)
With Ion becoming Neuron i thought maybe new code would fix it but its still being worked on by Omnicc author.

This has been an issue at least as far back as Macaroon (I wasn't around in the Trinity days), unfortunately, so it's probably a legacy code issue. I'd love to see this fixed, too, OmniCC's only real use for me is to show cooldowns on things in my bags (hearthstone, etc) but it doesn't have an option to ONLY show them in bags. In testing a year or so ago disabling the button timers in Neuron (or Ion) also disabled them in OmniCC regardless of how I had the default UI setting set in Interface -> ActionBars -> Show Numbers For Cooldowns. I'm assuming that's still the case. I'm not sure if this is necessarily a Neuron issue but it seems to me that allowing an alpha of 0 for the timers would "fix" this by functionally hiding the Neuron number while still prompting OmniCC to display its own. However, I've never been able to get that alpha setting to work.

i tried the alpha hack and it works until next login!
closing this due to its dependence/conflict with other add-on.

no, the actual text that count downs to zero (right icon on the attached screenshot). I have to use omnicc because of its integration with other mods.

To me it seems to be related to saving/persisting the settings between sessions or reloads. I have to make bag bar & cast bar hidden every time i log in, so maybe hiding the timer text also doesn't get saved and I get the duplicate.

I have this since start. Duplicate cooldown text with omni cc enabled. However in Neuron Cooldown text turned off. I go into settings, turn it off and SOMETIMES it works FOR A WHILE!
I use macros with modifiers, and I think that also add to the problem. Somehow when I push the modifier and the spell on the mod:shit e.g. is on cooldown then I start to see duplicates again.

OmniCC owner says the issue isn't on his end. :(

However I can't turn off omniCC that will remove CD Timer on other addons that I also use and need Timer on those.