Ashley act a little bit hastily in closing "bug" reports^^
in r198 the sync did not work anymore if a tab is hidden or the window is minimized.
the sprites go hidden and reappear. can agree it was fine in r197 and before.
so i guess there was any changes or maybe old bug fixes was lost.
why not compare the changes from r197 to r198?
it can also happens if the multiplayer object without changes get intern from c2 some other input.