I am in the middle of converting my bike with road handlebar to a flat bar. The old road bar has a Shimano 105 brake/shifter and 105 derailleur. Something like this: https://www.mec.ca/en/product/5055-021/105-ST-5700-L-STI-2x10-Speed-Lever-Set
The bike is a 10 speed.
I bought some Tiagra Road flat bar shifters: SL-4700-R 10s and SL-4703-L
The Left hand SL-4703-L works perfectly. However, the SL-4700-R right side shifts up nicely for about 4 to 6 rings, and then skips a ring. Playing with the tension just changes which ring gets skipped.
I take it I screwed up and the new shifter is not compatible with the derailleur / cassette.
Is my only option to return the shifters and try to find something else?
Edit: Found a video -