I encountered the same issue. Do you plan to solve it?

Same thing on mantisbt 1.2.17
Mmmh after one day of searching I found a workaround (mmmh and now it seems to be the solution that will be adopted ? If it is, it was a pleasure to help the project but I'd like to had the confirmation that I found the precise problem and solution)

On line 298 on /bug_report_page.php, there is:
<?php print_profile_option_list( auth_get_current_user_id(), $f_profile_id ) ?>
If you modify to
<?php print_profile_option_list( auth_get_current_user_id(), profile_get_default(auth_get_current_user_id()) ) ?>
The default profile used will be the current user's default profile, instead of just current user's ID.

but I'd like to had the confirmation that I found the precise problem and solution

I didn't have a deeper look, but your proposed change is quite different from what dregad changed

https://github.com/mantisbt/mantisbt/commit/6baf7650fe321a149302c64682f94dbdb2b51b3a

poulpy55, your workaround was not addressing the root cause of the problem. The correct solution was actually outlined by russ in the original issue description.

Anyway, your bumping the issue made me look at it and implement the fix, so you did contribute to the project - even indirectly - so thanks anyway.

Backported to 1.2.x