We are running firebird 2.5.6 and at uneven intervals the service is crashing with the following log

"C:\Program Files\Firebird\Firebird_2_5\bin\fbserver.exe": terminated abnormally (4294967295)

It typically happens at night, but not directly related to any scheduled task. It does run on a virtual server in the cloud, so there could be other maintenenance services running that we do not see.

The load on the CPU for firbird is fairly high, but I would still not expect a crash like this.
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