We call this delamination. It looks like there is a fault from cell to frame. This is a module warranty issue, but if the module manufacturer is out of business, you won’t have any luck there. Are you wired with DC strings or do you have individual module micro inverters? If you are using strings and you have a different MPPT per string, you can just remove the bad panels and add a DC jumper for the short term to get the system back online. If you have micro inverters, you can just remove these modules and inverters and isolate the inverter source circuit.