Completely different results for unchanged specifications

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https://abrp.upvoty.com/b/report-a-bug/completely-different-results-for-unchanged-specifications/
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ABRP version 4.4.5 (2023), Safari 16.5.2, MacOS 13.4.1.(c)
the results according to the attachments appears alternately (but irregular) even though no changes are made in specifications (neither waypoints nor other options).
procedure:

• start a calculation
• press the "restart" button
• start calculation with the same specifications

one result seems to be ok, the other result does not respect some waypoints and overall ist seems to be unrealizable