It's been over two months now since the bug has been reported to the internal bug tracker, and still no resolution. I find having more than one marker super helpful, and I'm starting to think that the dev team is ignoring this issue. Please resolve this issue!
Yes, the bug still happens in a Realms server I pay for.
Same problem with me as well. I'm playing on Windows 10 version 1.2.8. I have a stronghold that seems to not have an end portal. My world seed is 4879820. The staircase leading to my stronghold is at 691, 20, -1100. If someone could check if I in fact do not have an end portal in my stronghold, that would be greatly appreciated. Thanks.