Wrong file size if resize is used

[jdemovic]

Expected behavior

If I use the Image Resizing property. The file size will be checked after resizing.
Max file size is set to 1MB.
JPEG file is 5MB size. After resizing It has 0.5MB.
Image should be uploaded without exceeding maximum image size check.

Actual behavior

File can't be uploaded due to exceed max file size 1MB. (reduced size is 0.5MB If I allow bigger files and check the collection using dbms_lob.getlength)

APEX version

18.2