Incorrect output with '(23A, 1X, F4.1, 2X, 1A)' format

Question

I am writing my first FORTRAN program since 1989 (using FORTRAN77) and this is my introduction to a modern FORTRAN. I am having trouble with formatting write statements. Specifically, after reading a REAL value and a CHARACTER, I then use a formatted WRITE statement to allow the user to review the input. I can use an unformatted WRITE statement and everything is fine, however, if I use a simple formatting statement, the resulting output is garbage. The following is my MWE:

! MWE program testing formatted write of a real number
!
! bash cmd line gfortran-9 -o MWE_formated_write MWE_formated_write.f95
! build environment:
!   Kubuntu 21.04 / kernel 5.11.0-34-generic
!   GNU Fortran (Ubuntu 9.3.0-23ubuntu2) 9.3.0
!   laptop w/ 4x Intel i5-5200U @ 2.2 GHz w/ 8 GiB ram
!
program MWE_formated_write
!
implicit none
real :: temp_input                     ! input temperature
character(len=1) :: temp_input_units   ! input temperature unit, [F]/[C]/[R]/[K]
!
! Get input temperature and temperature units
!
write(*,*) "Enter the temperature and units F/C/R/K: "
read(*,*) temp_input, temp_input_units
!
! verify the input temperature and temperature units
!
write(*, *) "     You entered (raw):", temp_input, temp_input_units
write(*, '(23A, 1X, F4.1, 2X, 1A)') "You entered (formated):", temp_input, temp_input_units
!
stop
end program MWE_formated_write

and a capture of the output:

joseph@bohr:~/Projects$ gfortran-9 -o MWE_formated_write MWE_formated_write.f95
joseph@bohr:~/Projects$ ./MWE_formated_write
 Enter the temperature and units F/C/R/K:
95 F
      You entered (raw):   95.0000000     F
You entered (formated):�BF

I expected the second line to output "You entered (formated): 95.1 F".