Navigation: loading custom waypoints from .pln files is broken on some systems

Do you have the same issue if you follow the OP’s steps to reproduce it?

Seems this bug is back. Running Navigraph AIRAC 2306 in Little Nav Map and MSFS2020. If I save a plan in Little Nav Map OR MSFS2020 that has custom waypooints. Then when I load it back in the custom waypoints are actually in the North pole. 2023-07-07T04:00:00Z
Provide extra information to complete the original desc ription of the issue:

Custom way points loaded into MSFS from a .pln file always show up in the north pole. Whether they are created in MSFS or a 3rd party application.
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