That is quite good news for Chelsea fans and also the Stake company if it is true that they have worked together for next season, but for Chelsea's performance issues I don't think there will be any influence on the sponsors because the performance of a team always depends on how management plays. the team got good players and trained by experienced coaches. So it has nothing to do with sponsors except just about business and finances, but it's pretty good news for both of them to sail next season.
Sponsors directly support the club's finances which will then also have an impact on the balance of their financial condition when the team pays the salaries of players, coaches and brings in several new players. The sponsor's budget will have an impact on the team, especially if the budget invested by the sponsor is very large, then the team's performance can also be helped by this.
To be honest, I don't know exactly where a club's sponsorship budget goes, but as I said above, that's my guess for now. Despite all that, I'm just sure an increase in performance from Chelsea can be expected next season. They have looked more mature after the last season failed to show good performance.