User titles randomly replaced with numbers (0, 2) on the forum

[Mark]

As said above

I think anyone that had an unedited "Active Member" title had it replaced with "0", there are some "2"'s too, I am not sure about others.

You will see ~5 examples here: https://forum.rigsofrods.org/members/?key=xfrm_most_resources

 

[CuriousMike]

I'm pretty sure this happened after the forum software was upgraded from VBulletin to XenForo in 2018. The effected users just never updated their profile title since then.