signature verification fails on 1 out of 3 messages

[phra]

hi,

i have a strange issue with verifying signature with a specific xml message.
i've created a repro code on runkit available here: https://runkit.com/phra/59f0d6670f3020001512de20

as you can see the first two messages get validated correctly while the last one does not. do you have idea of what can be? (i've used the Array.prototype.pop() method on the result of the xpath query in order to retrieve the last signature and not the inner ones)

thanks.

[phra]

i've also tried to update the related xpath query in the enveloped-signature algorithm implementation.