If you often bust just before the money (bubble), it could be a sign, that you are taking to many risks in this phase of the tournament. However per definition this should mean, you reach the money with a larger stack on average, and then you should not also bust to often in the post-bubble phase. So I think, this is most likely a case of focusing on a meaningless small sample, where you just happened to have many bustouts in this particular part of the tournament.
If you are relatively new to the game, I will advice you to forget about such macro factors for now and instead focus on playing each hand as well as possible. Rather than asking "what should I do on the bubble", its better to ask questions like "how should I play top pair medium kicker in a multiway pot". Its not, that bubble play require no adjustments, but its difficult to adjust well, if you have no idea, what you are adjusting from.
So get your baseline set first. A great way of doing this is to review hands after a session, and if you find some, where you are really not sure, if you played them well, then share them to the tournament hand analysis section. There are some long time winning tournament players in this forum, and we are happy to help new members, who take the time and effort to share hands.