Does setting PdfField.Font.Size stick — including over Auto?

document 55645   dpi 144   pages 3

as imported, text-field Font.Size histogram (0 = Auto):
   18  x3
   22  x6
   23  x9
   24  x87

made an Auto field to test against: TEXT.1.1.0 -> 0, saved
   after reload it reads 0  (Auto held)

probe AUTO  h=17u  TEXT.1.1.0
   set to 16; in-memory reads back 16
probe size 18  h=22u  TEXT.1.0
   set to 16; in-memory reads back 16
saved.

after reload: HELD  16   TEXT.1.0
after reload: HELD  16   TEXT.1.1.0
held 2, lost 0

stored docXml <f s="…"> histogram:
   s=0  x83
   s=16  x2
   s=18  x3
   s=22  x6
   s=23  x9
   s=24  x87

cleaned up: deleted document 55645