Soldermask bridge spacing

Hello,

We got a comment from PCBWay about insufficient spacing for a soldermask bridge between a few parts because the spacing is .15mm and they need at least .2mm. They recommended either modifying the file to increase the spacing or accepting no soldermask in that location. Any thoughts on this issue? Has this come up previously, and is this important enough that the mask is crucial? I've attached an image they provided referring to the part of the design in question. Thanks!