Proper patch or 'fast' patch? If former, did you apply glue to tube, not patch? Did you let the glue go off before sticking? If later, there's your answer. :)
It was a proper patch, I applied glue to the tube and let it go off before sticking but I'm not a patch technician I just ride bike.
Actually there's a 'fast' patch on that same tube which is doing fine and has been there longer. A lezyne one I think.
https://www.youtube.com/watch?v=UVrwzjtBHq0
@Belagerent started
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Proper patch or 'fast' patch? If former, did you apply glue to tube, not patch? Did you let the glue go off before sticking? If later, there's your answer. :)