Whitespot (or Bleeding?) on a Pocketbook 632 Aqua

Hello,

Does anyone has experienced the same case as me on Pocketbook 632?
Mine is Pocketbook 632 Aqua.

Suddenly something like a white spot or maybe like LCD bleeding appears on the corner and likely it getting larger.
For as long as I remember, it never dropped or crashed. I always put it on a magnetic flip case cover, an official from Pocketbook.

Any tips to remove it? Or I should replace the screen with the new one?

Thanks,

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