Just loaded a random seed and with in easy reach of spawn there are at least 16 Ruined Nether Portals.
They are more common than villages (9 within the same area) – however there seems to be a continued excess of Ruined Villages (an additional 5 on top of the 9 normal villages).
Thank you for your report!
We're actually already tracking this issue at MCPE-68999, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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