For those of you that use GridTracker to log to LoTW and are using version 1.22.1204 (very recent issue), please note the following statement in the changelog for the newest version 1.23.0110:
GENERAL INFORMATION
An oversight in Logbook of the World handling can cause GT to callback to LoTW repeatedly every 1⁄2 second. Please update as soon as possible if you are a LoTW member.
CHANGELOG
- Emergency LoTW fix
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Please upgrade immediately at https://gridtracker.org/index.php/downloads/gridtracker/gridtracker-releases/v1-23-0110/files