Sandbay
FWIW, I know nothing and I HATE WIRING. However, I've been through this one.
IF you've got the lights wired CORRECTLY, don't fight the problem. Several guys have told you to get yourself an Electronic Flasher and even explained why.
That will solve your problem immediately. (They're also great for incandescent bulbs.)
An electronic flasher will CORRECTLY flash all incandescent bulbs, All LED bulbs and/or a combination of both types.
Any auto parts store - make sure you get one with the same number of connectors as your old flasher. Then, it's plug-n-play!
May we all ride safely, with a wide grin!