Using them in the last hour of match - it seems that rather than the 1 minute limit, the boost is imposing the 5 minute limit from the last 12 hours of the match, and giving a funky timer. The boost can be used again after 5 minutes are up.

Thanks for the heads up.

It looks like there may have been a logic error with this that was causing issues. It should be fixed now.

Let me know if this is still an issue in future rounds.