Shares of Beyond Meat Inc. slid 14% Friday toward their lowest level since April 2020, after the maker of plant-based imitation meat products issued a revenue warning for the third quarter, citing a range of issues including the highly transmissible delta variant of the coronavirus.

But the virus that causes COVID-19 was not the only reason for the warning. The El Segundo, Calif.–based company BYND said it also experienced a decline in retail orders from a Canadian distributor that lasted longer than expected and came just…