Hey,
if the other two accounts are no spam bots (in the last two days multiple spam bots had posted here at the same time) but real users (one had posted 7 years ago according to a banner shown to me):
I think if this started to happen recently (i think this could be possible if now two other users are just posting “Have the same problem” without giving much details) then i think that it could maybe make sense to notify the ownCloud android app developers about a possible recently introduced problem over at the GitHub issue tracker of the Android app.