Writing data to flash STM32L476RE

I use STM32L476RET6 and try write data to flash. I write full page (2K) it's working ecept end page (Page 383) Bank 2.

I calculate addres for page 382 bank 2: 0x0800 0000 + 0x7F000 and correct data to write.

I calculate addres for page 383 bank 2: 0x0800 0000 + 0x7F800 and data no writed. Page cleared.

I use code:

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uint32_t addr = 0x807F800; // Address 383 Pages, bank 2 or 0x807F000 for 382 pages

HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, addr, data[i]);

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I need help on this issue. Any help and hints are appreciated. Thank you in advance!