Many have experienced this. the reason is that the market conditions are not good. but I see it is not that but the bonus is so big and also if their bounty allocation is large it also greatly affects the price when the initial listing on the market.
all depends on the ability of the team to build their market before the listing is exchanged. the mistake is that too many communities hold tokens and most want to sell, but very few want to buy. that's what keeps prices down. teams should build their markets first before they can trade their tokens.