I'm not sure exactly which part has the error, but it bisected in LO 6.1 to author Armin Le Grand on 2018-04-06 22:29:02 +0200 with commit 6c14c27c75a03e2363f2b363ddf0a6f2f46cfa91 SOSAW080: Added first bunch of basic changes to helpers SOSAW080: Make SdrModel& prerequisite to SdrObjects The issue is with attachment 174540 [details] (from bug 144092). There are two empty rows, and the arrows are supposed to be pointing to the centre of each empty row. A PDF comparison suggests the problem is with the table shrinking - especially related to the empty rows. [Note: other issues caused even more problems with empty rows since then. Those regressions have been fixed in 7.5.]
Created attachment 182217 [details] Comparison screenshot Confirmed using LO 7.5.0.0.alpha0+ (dc92a4d973086ce8a6a5f75ba0f4d4c9ca05537a) / Windows.
repro 7.6+
repro 24.8+