IE11 - Episerver.Forms js error

Hello, 

We're facing an issue using Epi forms on IE11. One of the scripts injected using: @Html.RequiredClientResources("Footer") is throwing a syntax error on IE11. 

In particular, it's this line: 

ValidationInfo.find(e=>e.targetElementId===l||e.targetElementName===l)

it seems to be using arrow functions (not supported by IE11). 

As it is being injected in the server we're not able to transpile it neither modify it. 

Versions:

<package id="EPiServer.Forms" version="4.28.0" targetFramework="net462" /><package id="EPiServer.Forms.Core" version="4.28.0" targetFramework="net462" /><package id="EPiServer.Forms.Samples" version="3.6.0" targetFramework="net462" /><package id="EPiServer.Forms.UI" version="4.28.0" targetFramework="net462" />

We've discovered that using the 4.27.0 version the error is gone, so most likely there's something wrong with the 4.28.0. 

Anyone having the same issue?

Any help is going to be appreciated. Thanks!