Incorrect core mask on coretime-rococo

[Szegoo]

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Description of bug

When querying the regions from the Rococo Coretime chain I noticed that four regions have the core mask of 'UUUUUUUUUU', which is not a valid value, as core masks are represented in hex.

Steps to reproduce

The RegionId of one such region:

{
      begin: 117,870
      core: 64
      mask: UUUUUUUUUU
}

Can be checked with PJS.

[bkchr]

CC @seadanda

[ggwpez]

Did you try querying raw storage? Unicode UUUUUUUUUU is exactly an 50% interlaced 80bit mask of b01010101010101010101010101010101010101010101010101010101010101010101010101010101.
Maybe PJS is being stupid and just tries to decode as UTF8 first.

[Szegoo]

Just checked, it is presented as 55555555555555555555 when raw, which is indeed b01010101010101010101010101010101010101010101010101010101010101010101010101010101