Our product team has completed the initial analysis of this issue (WORDSNET-16322). However, the implementation of the fix of this issue has been postponed till a later date (no ETA is available).
In this document footer has centered custom tab stop and paragraph is center aligned as well. If I use MS Word UI to align it left and then center again the tab stop is lost. So for some reason MS Word treats this center aligned tab as left aligned.
This seems to be affected by “forget last tab alignment” compatibility option. If I remove it then document is rendered in MS Word the same way as in Aspose.Words.
The workaround is to remove tab stop (or compatibility option) and right align the paragraph.