I know that I'm not the only one doing this, but I've done it a few times lately. The example I provide below is a case where I did it, but simply by following @platch who had made the mistake earlier. It's easy to do when you're juggling numerous tabs & issues.
When entering in a Related issues in the issue queue, one should not be able to enter in the issue that you're currently on. Probably easier to just insert a check so that there is a warning/error.
I posted about it here in a bit more depth (after being corrected):
#1833196-9: could not have interface in language A and create a translation from language B to language C →
It would be pretty easy I think to find how many times this has been done in d.o, but probably just better to make sure it can't happen into the future.
It's annoying for everyone.
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