I have created a blossom project in magnolia version 5.3.2. and I just upgrade it to version 5.3.7.
after upgrade, all the links created using jsp taglib were broken.
For example:
if the content.logoUrl 's input value is /test/logimage
here is the jsp code:
<c:set var="logoImage" value="${cmsfn:content(content.logoUrl,'dam')}" />
<img alt="logo" src="${cmsfn:link(cmsfn:asContentMap(logoImage))}">

in version 5.3.2, ${cmsfn:link(cmsfn:asContentMap())} will return "/dam/jcr:[uuid]/logoimage"
but in version 5.3.7, it returns /test/logimage.html"

so in 5.3.7 all the links created this way were broken.
I tried to searching for documents for how to migrate from 5.3.2 to 5.3.7, but it seems I don't need special steps or script changes.