If you create a timeline with this kind of syntax.
<S t="38045221250" d="28800000" r="245"/>
(you repeat a chunk duration for quite a long time, or with a long duration).
It stops after ~150chunks, which seems to converge to an int32 overflow in this case.
The time computation for chunk 150 is: 28800000150 , the result is greater than 2*32
There is probably an overflow, this computation shall be done with 64bits integers.
The time computation for chunk 150 is: 28800000x150 , the result is greater than 2pow(32)
This should now be fixed on git thanks for the report
Diff: