MudStepper - mudstep title div width

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When using the MudStepper, with mobile view enabled, the div that holds the mud step title is defaulting to a width of 20%. This is causing wrapping issues for the mud step's title text. In the example on your page your div is 33.333333333333336%. I have tried adding CSS to override this using !important but the component still defaults to 20%.

How can I get the 33.33% width to be used instead of the default 20%?