XMP doesn't do damage to resonators

in Report a Bug
I was cleaning some portals to capture them after but 1 portal, only one portal stopped taking damage in the last 2 resonators lvl2. Waste my Apex time and more less 100 XMP 8 cause i thought the other agent was recharging or deploying. Is there anyone with the same problem? Is there any thing you can do because I waste 1 apex and xmps?
Thank you for your patience and attention.
DemmSax
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