As said if the affected indicator is left on it will normally reset itself, however on my last ride lost all indicators, no warning light, no direction arrows on the dash and no indicators at all.
Stopped the bike switched ignition off and restarted, all working again?
Have booked the bike into triumph, they told me they had a bike last week same issue, reckon they pushed on all the connectors and cleared it. I’m not convinced will wait and see what happens when I get my bike in to them.
In this condition the bike would not pass an m.o.t. Test, so to my mind that makes the bike un road worthy, not good for 11 months old